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SW8090120_HISTORICAL FILE_20090722
STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW8 0 o1 omo DOC TYPE ❑ CURRENT PERMIT ❑ APPROVED PLANS NJ HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE Zooq 0-122 YYYYMMDD r NC®ENR North Carolina Department of Environment and Natural Resources Division of Water Quality Beverly Eaves Perdue Colleen H. Sullins Governor Director July 22, 2009 S. F. Ballou, Jr., President S. F. Ballou, Inc. 301 Commerce Avenue, Suite 101 Morehead City, NC 28557 Subject: Stormwater Management Permit No. SW8 090120 Scotts Farm subdivision Low Density Subdivision with a Curb Outlet Swale System Carteret County Dear Mr. Ballou Dee Freeman Secretary The Wilmington Regional Office received a Stormwater Management Permit Application for Scotts Farm subdivision on January 21, 2009 with additional information submitted on April 27 and July 1, 2009. Staff review of the plans and specifications has determined that the project, as proposed, will comply with the Stormwater Regulations set forth in Title 15A NCAC 2H.1000. We are forwarding Permit No. SW8 090120, dated July 22, 2009, for the construction of the subject project. This permit shall be effective from the date of issuance until rescinded and shall be subject to the conditions and limitations as specified therein, and does not supercede any other agency permit that may be required. If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing upon written request within thirty (30) days following receipt of this permit. This request must be in the form of a written petition, conforming to Chapter 1506 of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands are made this permit shall be final and binding. If you have any questions, or need additional information concerning this matter, please contact either M.J. Naugle or me at (910) 796-7215. Sincerely, 7i 0,�_ �Georgette cott Stormwater Supervisor Division of Water Quality GDS/mjn: S:\WQS\STORMWATER\PERMIT\090120 ju109 cc: William Gold, P.E., Meridian Engineering, P.A., 252-522-2587, fax: 2501 Inspector, Town of Morehead City — Inspections Division of Coastal Management NCDOT District Engineer Wilmington Regional Office Central Files M.J. Naugle Wilmington Regional Office 127 Cardinal Drive Extension, Wilmington, North Carolina 28405 One Phone 910-796-72151FAX- 910-350-20041Customer Service. 1-877-623-6748 NorthCarolina Internet:w nmaterquality org a�n�K'/Nn� An Equal OppoCumty 1 Atfrmabve ACUon Employer �/K s I4" State Stormwater Management Systems Permit No. SW8 090120 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY STATE STORMWATER MANAGEMENT PERMIT LOW DENSITY SUBDIVISION WITH A CURB OUTLET SWALE SYSTEM In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as amended, and other applicable Laws, Rules and Regulations PERMISSION IS HEREBY GRANTED TO S. F. Ballou, Jr. and S.F. Ballou, Inc. Scotts Farm Subdivision 1545 Country Club Road, Morehead City, Carteret County FOR THE construction, operation and maintenance of a 25% low density subdivision with a curb outlet swale system in compliance with the provisions of 15A NCAC 2H .1000 (hereafter referred to as the "stormwater rules') and the approved stormwater management plans and specifications, and other supporting data as attached and on file with and approved by the Division of Water Quality and considered a part of this permit. The Permit shall be effective from the date of issuance until rescinded and shall be subject to the following specific conditions and limitations: I. DESIGN STANDARDS Each of the 18 lots is limited to a maximum amount of built -upon area as indicated in Section 11.11 (f) of this permit. CAMA regulations may reduce the allowable built -upon area for those lots within the AEC. 2. The overall tract built -upon area percentage for the project must be maintained at 25%, per the requirements of Section .1005 of the stormwater rules. 3. This project proposes a curb outlet system. Each designated curb outlet swale or 100 foot vegetated area shown on the approved plan must be maintained at a minimum of 100 feet long, maintain 5:1 (H:V) side slopes or flatter, have a longitudinal slope no steeper than 5%, carry the flow from a 10 year storm in a non -erosive manner, maintain a dense vegetated cover, and be located in either a dedicated common area or a recorded drainage easement. 4. No piping shall be allowed except those minimum amounts necessary to direct runoff beneath an impervious surface such as a road or under driveways to provide access to lots. 5. Runoff conveyances other than the curb outlet system swales, such as perimeter ditches, must be vegetated with side slopes no steeper than 3:1 (H:V). 6. Approved plans and specifications for projects covered by this permit are incorporated by reference and are enforceable parts of the permit. Page 2 of 6 State Stormwater Management Systems Permit No. SW8 090120 II. SCHEDULE OF COMPLIANCE Curb outlet swales, vegetated areas and other vegetated conveyances shall be constructed in their entirety, vegetated, and be operational for their intended use prior to the construction of any built -upon surface, per the approved plans During construction, erosion shall be kept to a minimum and any eroded areas of the swales or other vegetated conveyances will be repaired immediately. The permittee shall at all times provide the operation and maintenance necessary to operate the permitted stormwater management systems at optimum efficiency to include: a. Inspections b. Sediment removal. C. Mowing, and re -vegetating of the side slopes. d. Immediate repair of eroded areas. e. Maintenance of side slopes in accordance with approved plans and specifications. f. Cleaning and repair of catch basin grates, flumes, piping, and the flow spreader mechanism. g. Maintenance of level spreaders. 4. The permittee shall submit to the Director and shall have received approval for revised plans, specifications, and calculations prior to construction, for any modification to the approved plans, including, but not limited to, those listed below: a. Any revision to the approved plans, regardless of size. b. Project name change. C. Transfer of ownership. d. Redesign or addition to the approved amount of built -upon area or to the drainage area. e. Further subdivision, acquisition or sale of the project area. The project area is defined as all property owned by the permittee, for which Sedimentation and Erosion Control Plan approval was sought. f. Filling in, piping, or altering any vegetative conveyance shown on the approved plan. 5. The permittee is responsible for verifying that the proposed built -upon area does not exceed the allowable built -upon area. Once the lot transfer is complete, the built -upon area may not be revised without approval from the Division of Water Quality, and responsibility for meeting the built -upon area limit is transferred to the individual property owner. 6. The permittee must certify in writing that the project's stormwater controls, and impervious surfaces have been constructed within substantial intent of the approved plans and specifications. Any deviation from the approved plans must be noted on the Certification. The permittee shall submit the Certification to the Division within 30 days of completion of the project. 7. The permittee shall submit all information requested by the Director or his representative within the time frame specified in the written information request. 8. Each lot in the subdivision covered by this permit will maintain a minimum 30 feet wide vegetative buffer between all impervious areas and surface waters. 9. All roof drains must terminate at least 30 feet from the Mean High Water mark. 10. Deed restrictions are incorporated into this permit by reference and must be recorded with the Office of the Register of Deeds prior to the sale of any lot. Page 3 of 6 State Stormwater Management Systems Permit No. SW8 090120 11. Recorded deed restrictions must include, at a minimum, the following statements related to stormwater management: a. The following covenants are intended to ensure ongoing compliance with State Stormwater Management Permit Number SW8 090120, as issued by the Division of Water Quality under NCAC 2H.1000. b. The State of North Carolina is made a beneficiary of these covenants to the extent necessary to maintain compliance with the Stormwater Management Permit. C. These covenants are to run with the land and be binding on all persons and parties claiming under them. d. The covenants pertaining to stormwater may not be altered or rescinded without the express written consent of the State of North Carolina, Division of Water Quality. e. Alteration of the drainage as shown on the approved plans may not take place without the concurrence of the Division of Water Quality. f. The maximum built -upon area (BUA) per lot is as follows: Lot Number BUA (square feet) 1 2,062 2through 15 2,120 16 2,214 17 2,410 18 2,402 Lift station lot 1,307 This allotted amount includes any built -upon area constructed within the lot property boundaries, and that portion of the right-of-way between the front lot line and the edge of the pavement. Built upon area includes, but is not limited to, structures, asphalt, concrete, gravel, brick, stone, slate, coquina, driveways, and parking areas, but does not include raised, open wood decking, or the water surface of swimming pools. g. Filling in, piping or altering any 3:1 vegetated conveyances (ditches, swales, etc.) associated with the development except for average driveway crossings, is prohibited by any persons. h. For those lots within the CAMA Area of Environmental Concern, where DCM calculates a different maximum lot built -upon area, the governing maximum lot BUA shall be the more restrictive of the two amounts. i. Filling in, piping or altering any designated 5:1 curb outlet swale or vegetated area associated with the development is prohibited by any persons. j. A 30 foot vegetated buffer must be maintained between all built -upon area and the Mean High Water line of surface waters. k. All roof drains shall terminate at least 30 feet from the Mean High Water mark. I. Each designated curb outlet swale or 100 foot vegetated area shown on the approved plan must be maintained at a minimum of 100 feet long, maintain 5:1 (H:V) side slopes or flatter, have a longitudinal slope no steeper than 5%, carry the flow from a 10 year storm in a non -erosive manner, maintain a dense vegetated cover, and be located in either a dedicated common area or a recorded drainage easement. 12. The permittee must submit a copy of the recorded deed restrictions within 30 days of the date of recording. 13. The Director may notify the permittee when the permitted site does not meet one or more of the minimum requirements of the permit. Within the time frame specified in the notice, the permittee shall submit a written time schedule to the Director for modifying the site to meet minimum requirements. The permittee shall provide copies of revised plans and certification in writing to the Director that the changes have been made. Page 4 of 6 State Stormwater Management Systems Permit No. SW8 090120 14. Prior to transfer of ownership, the swales must be inspected and determined to be in compliance with the permit. Any deficiencies will be repaired or replaced prior to the transfer. 15. The final plats for the project will be recorded showing all required easements and common areas, in accordance with the approved plans. 16. Prior to the development of any future area or additional phase noted on the approved plans, a permit modification must be submitted to and approved by the Division. The modification must demonstrate that the built -upon area does not exceed the maximum amount permitted under this permit and that it meets the intent of low -density development per the stormwater rules and available guidance. III. GENERAL CONDITIONS 1. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to an enforcement action by the Division of Water Quality, in accordance with North Carolina General Statutes 143-215.6A to 143-215.6C. 2. The permit issued shall continue in force and effect until revoked or terminated. 3. The permit may be modified, revoked and reissued or terminated for cause. The filing of a request for a permit modification, revocation and re -issuance, or termination does not stay any permit condition. 4. The issuance of this permit does not prohibit the Director from reopening and modifying the permit, revoking and reissuing the permit, or terminating the permit as allowed by the laws, rules, and regulations contained in Title 15A of the North Carolina Administrative Code, Subchapter 2H.1000; and North Carolina General Statute 143-215.1 et. al. 5. The permit is not transferable to any person or entity except after notice to and approval by the Director. The Director may require modification or revocation and re -issuance of the permit to change the name and incorporate such other requirements as may be necessary. A completed Name/Ownership Change form, signed by both parties, must be submitted to the Division of Water Quality accompanied by the supporting documentation as listed on page 2 of the form. The approval of this request will be considered on its merits, and may or may not be approved. 6. The permittee is responsible for compliance with all the terms and conditions of this permit until the Division approves the permit transfer. Neither the sale of the project nor the transfer of common area to a third party constitutes an approved transfer of the stormwater permit. 7. The issuance of this permit does not preclude the Permittee from complying with any and all statutes, rules, regulations, or ordinances imposed by other government agencies (local, state and federal), which have jurisdiction. 8. The permittee grants permission to DENR Staff to enter the property during normal business hours for the purposes of inspecting the stormwater control system and it's components. 9. The permittee shall notify the Division in writing of any name, ownership or mailing address changes at least 30 days prior to making such changes. Page 5 of 6 State Stormwater Management Systems Permit No. SW8 090120 10. Unless specified elsewhere, permanent seeding requirements for the swales must follow the guidelines established in the North Carolina Erosion and Sediment Control Planning and Design Manual. Permit issued this the twenty-second day of July 2009. NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION q---------------------- for Coleel H. Sullins, Director Division of Water Quality By Authority of the Environmental Management Commission Page 6 of 6 tVto PLue � Y � DWQ USE ONLY Date Received Fee Paid Permit Number - z i - -,? n0 s�. -;4z '0 yQiz-'9 State of North Carolina Department of Environment and Natural Resources CI 1v oe Division of Water Quality C. SEP 3 Q 008 STORMWATER MANAGEMENT PERMIT APPLICATION FORM This form ntay be photocopied for use as an original BY: JQ� 1 I. GENERAL INFORMATION y �S �9. 1. Applicants name (specify the name of the corporation, individual, etc. who owns the project): 2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance): Sammie Ballou 5 4 r, 13'A ULou) Trr, , `REsj wtkr1 3 Mailing Address for person listed in item 2 above: 301 Commerce Avenue City:Morehead City State:N. C. Zip:28557 Phone: (252 ) 241-7966 Emai1:N / A Fax: (252 ) 726-5814 4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans, specifications, letters, operation and maintenance agreements, etc.): Scotts Farm Subdivision 5. Location of Project (street address): 1545 Country Club Road City:Morehead City, N. C. County:Carteret Zip:28557 6. Directions to project (from nearest major intersection): From intersection of Highway 24 and 70 go --2000 feet east, turn left onto Country Club Drive, proceed -3 miles to property, located on the west side of Country Club Drive 7. Latitude:34045' 42" N Longitude:76° 44' 06" W of project 8. Contact person who can answer questions about the project: Name:William A. Gold Telephone Number: (252 ) 522-2587 Email:wgold2©sudden Iink.net it. PERMIT INFORMATION: Form SWU-101 Version 03 27.08 Page 1 of 1: • Specify whether project is (check one): ®New ❑Renewal ❑Modification 2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the existing permit number and its issue date (if known) D 3. Specify the type of project (check one): JUL 01 2009 ®Low Density ❑High Density [—]Redevelop ❑General Permit ❑Universal SMP ❑Other 4. Additional Project Requirements (check applicable blanks; information on required state pe obtained by contacting the Customer Service Center at 1-877-623-6748): ❑CAMA Major ®Sedimentation/Erosion Control ❑404/401 Permit ®NPDES Stormwater IIL PROJECT INFORMATION 1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative (one to two pages) describing stormwater management for the project. The road surfaces of the 8.2ac site will drain into curbcuts and into grassed swales. The swales will drain into the travezoidalgrassed swales with 5:1 side slopes and longitudinal slope of 0.5%. All major design elements have 2. Stormwater runoff from this project drains to the Newport River basin. 3. Total Property Area: 8.18 acres 4. Total Wetlands Area: 0.0 acres 5. 100' Wide Strip of Wetland Area: acres (not applicable if no wetlands exist on site) 6. Total Project Area*':8.18 acres 7. Project Built Upon Area:24.95 % 8. How many drainage areas does the project have?1 9. Complete the following information for each drainage area. If there are more than two drainage areas in the project, attach an additional sheet with the information for each area provided in the same format as below. For high density vroiects, complete the table with one drainage area for each engineered stormwater device. Basin Information Drainage Area 1 Drainage Area 2 Receiving Stream Name Newport River Stream Class & Index No. SA/HWQ E (- IT Total Drainage Area (so 356,161 K8.2cci On -site Drainage Area (so 356,161 Off -site Drainage Area (so 0 Existing Impervious* Area (so Proposed Impervious;Area (so 88862 % Impervious' Area (total) 24.95 Impervious' Surface Area Drainage Area 1 Drainage Area 2 On -site Buildings (so 27,508 On -site Streets (so 48787 On -site Parking (so 10486 On -site Sidewalks (so 2081 Other on -site (so Off -site (so Total (so: 88862 2-Dgac% "Total project area shall be calculated based on the current policy regarding inclusion of wetlands in the built upon area percentage calculation. This is the area used to calculate percent project built upon area (BUA). 10. How was the off -site impervious area listed above derived?N-A IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS One of the following deed restrictions and protective covenants are required to be recorded for all subdivisions, outparcels and future development prior to the sale of any lot. If lot sizes vary significantly, a table listing each lot number, size and the allowable built -upon area for each lot must be provided as an attachment. Forms can be downloaded from htti2://h2o.enr.state.nc.us/su/bmp forms.htm - deed restrictions. Form DRPC-1 High Density Commercial Subdivisions Form DRPC-2 High Density Developments with Outparcels Form DRPC-3 High Density Residential Subdivisions Form DRPC-4 Low Density Commercial Subdivisions Form DRPC-5 Low Density Residential Subdivisions Form DRPC-6 Low Density Residential Subdivisions with Curb Outlets By your signature below, you certify that the recorded deed restrictions and protective covenants for this project shall include all the applicable items required in the above form, that the covenants will be binding on all parties and persons claiming under them, that they will run with the land, that the required covenants cannot be changed or deleted without concurrence from the State, and that they will be recorded prior to the sale of any lot. V. SUPPLEMENT FORMS The applicable state stormwater management permit supplement form(s) listed below must be submitted for each BMP specified for this project. Contact the Stormwater and General Permits Unit at (919) 733-5083 for the status and availability of these forms. Forms can be downloaded from httl2://h2o.enr.state.nc.us/su/bmp forms htm. Form SW401-Low Density Form SW401-Curb Outlet System Form SW401-Off-Site System Form SW401-Wet Detention Basin Form SW401-Infiltration Basin Form SW401-Infiltration Trench Form SW401-Bioretention Cell Form SW401-Level Spreader Form SW401-Wetland Form SW401-Grassed Swale Form SW401-Sand Filter Form SW401-Permeable Pavement Low Density Supplement Curb Outlet System Supplement Off -Site System Supplement Wet Detention Basin Supplement Infiltration Basin Supplement Underground Infiltration Trench Supplement Bioretention Cell Supplement Level Spreader/Filter Strip/Restored Riparian Buffer Supplement Constructed Wetland Supplement Grassed Swale Supplement Sand Filter Supplement Permeable Pavement Supplement 1I - VI.. SUBMITTAL REQUIREMENTS Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ). A complete package includes all of the items listed below. The complete application package should be submitted to the appropriate DWQ Office. (Appropriate office may be found by locating project on the interactive online map at http://h2o.enr.state.nc.us/su/msi maps.hun) Please indicate that you have provided the following required information by initialing in the space provided next to each item. • Original and one copy of the Stormwater Management Permit Application Form Initi Is • Original and one copy of the Deed Restrictions & Protective Covenants Form (if required as per Part IV above) • Original of the applicable Supplement Form(s) and O&M agreement(s) for each BMP • Permit application processing fee of $505 (Express: $4,000 for HD, $2,000 for LD) _ iL1 N1 — 4 payable to NCDENR • Calculations & detailed narrative description of stormwater treatment/management • Copy of any applicable soils report • Two copies of plans and specifications (sealed, signed & dated), including: � A_4AT= - Development/Project name - Engineer and firm -Legend - North arrow - Scale - Revision number & date - Mean high water line - Dimensioned property/project boundary - Location map with named streets or NCSR numbers - Original contours, proposed contours, spot elevations, finished floor elevations - Details of roads, drainage features, collection systems, and stormwater control measures - Wetlands delineated, or a note on plans that none exist - Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations - Drainage areas delineated - Vegetated buffers (where required) VIL AGENT AUTHORIZATION If you wish to designate authority to another individual or firm so that they may provide information on your behalf, please complete this section. (ex. designing engineer or firm) Designated agent (individual or firm):William A. Gold Mailing Address:600-D Plaza Boulevard City:Kinston State:N. C. Zip:28501 Phone: (252 ) 522-2587 Email:wgold2@suddenlink.net VIII. APPLICANT'S CERTIFICATION Fax: (252 ) 522-2501 I, (print or type name of person listed in General Information, item 2) Sannnie Ballow certify that the information included on this permit application form is, to the best of my knowledge, correct and that the project will be constructed in conformance with the approved plans, that the required deed restrictions and protective coven is will be rec ded, Ind that the proposed project complies with the requirements of 15A NCAC 2H .1000. Signature 1 Date: O D Form SWU-101 Version 03.27.08 Page 4 of ��Z LOT AREA Lot # 1 15,012,49 Sq. Ft. Lot # 2 15,106,08 Sq. Ft. Lot # 3 15,129.48 Sq. Ft. Lot # 4 15,151,61 Sq. Ft. Lot # 5 15,173.00 Sq. Ft. Lot # 6 15,193.00 Sq. Ft. Lot # 7 15,133.45 Sq. Ft. Lot # 8 15,152.63 Sq. Ft. Lot # 9 15,092.00 Sq. Ft. Lot # 10 15,109.91 Sq. Ft. Lot # 11 15,048.65 Sq. Ft. Lot # 12 15,065.28 Sq. Ft. Lot # 13 15,003.38 Sq. Ft. Lot # 14 15,018.73 Sq. Ft. Lot # 15 15,033.12 Sq. Ft. Lot # 16 15,158.73 Sq. Ft, Lot # 17 17,057.70 Sq. Ft. Lot # 18 15,143.51 Sq. Ft. LIFT STA. SITE 242.2 Sq. Ft. TOTALS 274,025Sq. Ft. BUA AND IMPERVIOUS AREA BY LOT HOUSE DRIVEWAY SIDEWALK STORAGE TOTAL 1420 441,40 115,65 84.51 2,062 1420 500 115.65 84.51 2,120 1420 500 115.65 84.51 2,120 1420 500 115.65 84.51 2,120 1420 500 115.65 84.51 2,120 1420 500 115.65 84.51 2,120 1420 500 115.65 84.51 2,120 1420 500 115.66 84.51 2,120 1420 500 115.66 84.51 2,120 1420 500 115.66 84.51 2,120 1420 500 115.66 84.51 2,120 1420 500 115.66 84.51 2,120 1420 500 115.66 84.51 2,120 1420 500 115.66 84.51 2,120 1420 500 115.66 84.51 2,120 1420 593.7 115.66 84.51 2,214 1420 790 115.66 84.51 2,410 1420 781 115.66 84.51 2,402 427 880 130�L- 25,987 10486 2081,88 1521.18 40075 ROAD, CURB AND GUTTER = 1.12 AC. = 48,787.2 Sq. Ft. Future = 0 Sq. Ft. Total Impervious = 40,075 + 48,787 = 88,862 Sq. Ft. Percent Impervious = 88,862 / 356,161 X 100 = 24.95% RCRI 3 h; JUl 'I BY:____ cX(goiiffJ ENGINEERING 388 MCCOTTER BLVD, HAVELOCK,NC 28532 252-349-5803, 252-444-5765 June 25, 2009 Ms Mary Jean Naugle North Carolina Division of Water Quality Wilmington Regional Office 127 Cardinal Drive Extension Wilmington, NC 28405 Re: Scotts Farm Subdivision Review Carteret County Mary Jean, We received your comments regarding Scotts Farm Subdivision, Morehead City, Carteret County, North Carolina and have addressed each as follows: COMMENT l: Please label drainage easements the same width on all plans. The rear lot easement on the south is labeled as 20 on Plan SE-1 behind lot 5 on Plan SP-5 behind lots 5 & 11, as 20 ft. scaled on Plan SP-4 along south lot lines RESPONSE 1: As seen on SP-4 and SP-5, the centerline of the proposed and existing ditch (which remains in the same location) is along the southern property line. To meet DENR requirements of width and side slopes, it was necessary to lay back the sides of the existing ditch on BOTH sides of the property line. On the north side of the property line (within the property) the easement was sized at 20 foot to include grading into the swale. On the south side of the property line (on adjacent property) the easement was sized at 10 foot to include 5:1 swale side slopes. We have added additional verbage to clarify the easements in the drawings. COMMENT 2: Since this is a low -density project, there is no collection system allowed, please limit piping to the minimum required to cross under roads. Please eliminate the pipe between 5&6 that is reported on plans SP-5,SW-I,SE-1. Plan SE-2 shows the piping stopping just after the road/sidewalk. All stormwater conveyance on low -density projects shall he vegetated conveyances. 15A NCACO2H.1005. The pipe between lots 5&6 needs to be a swale. RESPONSE 2: The pipe between lots 5 &6 has been removed. COMMENT 3: Please clarify the information for 5:1 trapezoidal swales. Plan SW-1 has an "open channel detail" with the 211 bottom dimensioned and the guidelines do not line up to the bottom for 2 ft. The note on plan SW-1 in lot 2 calls out the 5:1 swale and the top is labeled as 7.5 ft wide and the detail at the bottom of same plan dimensions the width at 15ft- as does the detail on SE-4. Please remove the detail for 3:1 V bottom swale on Plan DE-4. All plans need to report consistent information. The swales between lots need to be th 5:1 trapezoidal swale since they receive the curb outlet storm water run-off. The swale at the back of the lots needs to be the 5:1 trapezoidal swale since this is SA waters. RESPONSE 3: All swales are 5:1. In the cross section detail on SW-1, the bottom of the channel scales to 2ft, the dimension line has been revised to match. The top of the swales along the rear of the lot is shown/labeled correctly at 15'. The 3:1 V ditch detail on SE-4 has been revised to 5:1. DECEIVED JUL 0.1 2009 BY: COMMENT 4: Please verify the built -upon area associated with the lot for the lift station. Typically there is a bua associated with a road and personnel access etc. Please account for the bua associated with the lift station on the table for the deed restrictions, plan SP-1 and application page 2, etc for all application documents. RESPONSE 4: The table for deed restriction, low density supplement and SP-I has been revised to account for impervious surfaces in the lift station. COMMENT 5: Please revise the low -density supplement section I 1 calculation box on page 2 submitted April 27, 2009. The bua for roads changes. Include the number of lots proposed and the maximum allowable for lots. RESPONSE 5: Section 11 has been revised and table of BUA per lot included. COMMENT 6: Please provide the revised built upon area table for each lot as separate sheet. The table was provided on plan SP-1 and the application needs an 8 1/2x 1 I version included with the deed restriction. Please note that the bua data on SP-1 reports one sq ft short on the impervious subtotal for lots at the bottom. The bua table on page 2 of the application, Section 111(9) reports 36,687 + 2081 = 38,768 sf and Plan SP-1 reports 38,767 sf. RESPONSE 6: The Bua figures have been revised to account for impervious surfaces in the lift station lot (subtracted from future impervious). NO INCREASE in percent impervious. Page 2 of Application revised and included. COMMENT 7: Please remember that a change to one number, detail, or label may have a domino effect on other numbers. Please check all plans, calculations and application forms and make changes as needed RESPONSE 7: So noted. Thank you in advance for you time and consideration. With all our regards, fume �.�issyv Susan L. Sayger, PE, Cc9�lh� Engineering William Gold, PE, Meridian Engineering, P.A Naugle, Mary From: Naugle, Mary Sent: Wednesday, June 17, 2009 11 09 AM To: Linda Lewis Subject: FW: SW8 090120 Scotts Farm Additional Information Request 2 Attachments: 090120 jun09.doc; 090120 apr09.doc Linda fyi You will probably hear from the consultant. There is a pipe between 2 lots on low density and they won't replace the pipe with a vegetated conveyance. I sent an ad info in April and June and she leaves me phone messages that it is not good to do that because of the volume of water. The proposed plans fill an existing ditch through the property and reroute with this pipe. Sorry, it should be vegetated and so many other projects have been able to take the contributing drainage area/watershed from off -site and size the Swale accordingly to route the water around their property and this one should too for consistency and to meet the rule. I have the folder, but you had already looked at it in April. Just wanted to let you know in case she calls or a -mails you. I have attached the 2 ad info's. Thank you, Mary Jean Naugle NC DENR Express Permitting 910-796-7303 910-350-2004 fax . Please note: E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties. From: Naugle, Mary Sent: Wednesday, June 17, 2009 10:59 AM To: habersaygr@aol.com Subject: RE: SW8 090120 Scotts Farm Additional Information Request Sue; Click on "read only" when you try to open the document. No password is needed. Regarding the pipe, you can reply in writing and I will forward your justification for further review. I had reviewed this with the other reviewers here for consistency and low density projects require vegetated conveyances. You need to account for the full runoff volume in sizing the Swale between lots 5 & 6, but there needs to be a swale. I realize it will be a large swale and you will need to increase the drainage easement between those lots, but that occurs on sites like this where you fill an existing ditch and significantly alter the site hydrology. If you have a request for further review, please submit the justification and I will forward to the Stormwater Program Manager, Linda Lewis. Thank you Mary Jean Naugle NC DENR Express Permitting 910-796-7303 '1 910-350-2004 fax Please note: E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties. From: habersaygr@aol.com [mailto:habersaygr@aol.com] Sent: Wednesday, June 17, 2009 10:36 AM To: Naugle, Mary Subject: Re: SW8 090120 Scotts Farm Additional Information Request Mary Jean Your document won't open without a password. Thanks Sue -----Original Message ----- From: Naugle, Mary <mary.naugle@ncdenr.gov> To: habersayger@aol.com <habersayger@aol.com>; habersaygr@aol.com <habersaygr@aol.com> Sent: Wed, Jun 17, 2009 9:53 am Subject: SW8 090120 Scotts Farm Additional Information Request Sue; The attached request has been mailed to the applicant. The pipe between lots 5 and 6 needs to be replaced by vegetated conveyance. Other items arejust documentation. Thank you, Mary Jean Naugle NC DENR Express Permitting 910-796-7303 910-350-2004 fax Please note: E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties. Email correspondence to and from this sender is subject to the N.C. Public Records Law and may be disclosed to third parties Make your summer sizzle with fast and easy recipes for the grill. r' { \i _ ylr. Ar NCDENR North Carolina Department of Environment and Natural Resources Division of Water Quality Beverly Eaves Perdue Coleen H. Sullins Governor Director June 17. 2009 S. F. Ballou, Jr., President S. F. Ballou, Inc. 301 Commerce Avenue, Suite 101 Morehead City, NC 28557 Subject: Request for Additional Information Stormwater Project No. SW8 090120 Scotts Farm Subdivision Carteret County Dear Mr. Ballou: Dee Freeman Secretary The Wilmington Regional Office received a State Stormwater Management Permit Application for Scotts Farm Subdivision on January 21, 2009 with additional information submitted on April 27, 2009. A preliminary review of that information has determined that the following information is needed to continue the stormwater review: 1. Please label drainage easements the same width on all plans. The rear lot easement on the south is labeled as 20 ft. on Plan SE-1 behind lot 5, as 30 ft. on Plan SP-5 behind lots 5 & 11, as 20 ft. scaled on Plan SP-4 along south lot lines. 2. Since this is a low -density project, there is no collection system allowed, please limit piping to the minimum required to cross under roads. Please eliminate the pipe between lots 5 & 6 that is reported on plans SP-5, SW-1, SE-1. Plan SE-2 shows the pipe stopping just after the road/sidewalk. All stormwater conveyance on low -density projects shall be vegetated conveyances. 15A NCAC 02H.1005. The pipe between lots 5 & 6 needs to be a Swale. 3. Please clarify the information for 5:1 trapezoidal swales. Plan SW-1 has an "open channel detail" with the 2 ft bottom dimensioned and the guidelines do not line up to the bottom for 2 ft. The note on plan SW-1 in lot 2 calls out the 5:1 Swale typical and the top is labeled as 7.5 ft wide and the detail at the bottom of same plan dimensions the width at 15 ft - as does the detail on SE-4. Please remove the detail for 3:1 V bottom Swale on Plan DE-4. All plans need to report consistent information. The swales between lots need to be the 5:1 trapezoidal swale since they receive the curb outlet Stormwater runoff. The Swale at the back of the lots needs to be the 5:1 trapezoidal Swale since this is SA waters. 4. Please verify the built -upon area (bua) associated with the lot for the lift station. Typically there is bua associated with a road and personnel access, pump pad, manholes, etc... Please account for the bua associated with the lift station lot on the table for the deed restrictions, plan SP-1, and application page 2, etc... for all application documents. 5. Please revise the low -density supplement, section II calculation box on page 2 for the revised bua submitted April 27, 2009. The bua for roads changed. Include the number of lots proposed and the maximum allowable for lots. 6. Please provide the revised built -upon area table for each lot as a separate sheet. The table was provided on plan SP-1 and the application needs an 8 '/ x 11 version included with the deed restrictions. Please note that the bua data on SP-1 reports one (1) square foot short on the impervious subtotal for lots at the bottom. The bua table on page 2 of the application, Section III (9) reports 36,687 + 2081 = 38,768 sf and Plan SP-1 reports 38,767sf. Wilmington Regional Office 127 Cardinal Drive Extension, Wilmington, North Carolina 28405 On..U1et, Phone: 910-796-72151 FAX: 910-350-20041 Customer Service: 1-877-623-6748 NO1Cc" rofina Internet:w .nnvaterquality.org a�lNry//� An Equal Opportumly l Affirmative Acton Employer ;V/ a`u`al r AMA r NCDENR North Carolina Department of Environment and Natural Resources Division of Water Quality Beverly Eaves Perdue Colleen H. Sullins Governor Director June 17, 2009 S. F. Ballou, Jr., President S. F. Ballou, Inc. 301 Commerce Avenue, Suite 101 Morehead City, NC 28557 Subject: Request for Additional Information Stormwater Project No. SW8 090120 Scotts Farm Subdivision Carteret County Dear Mr. Ballow: Dee Freeman Secretary The Wilmington Regional Office received a State Stormwater Management Permit Application for Scotts Farm Subdivision on January 21, 2009 with additional information submitted on April 27, 2009. A preliminary review of that information has determined that the following information is needed to continue the stormwater review: 1. Please label drainage easements the same width on all plans. The rear lot easement on the south is labeled as 20 ft. on Plan SE-1 behind lot 5, as 30 ft. on Plan SP-5 behind lots 5 & 11, as 20 ft. scaled on Plan SP-4 along south lot lines. 2. Since this is a low -density project, there is no collection system allowed, please limit piping to the minimum required to cross under roads. Please eliminate the pipe between lots 5 & 6 that is reported on plans SP-5, SW-1, SE-1. Plan SE-2 shows the pipe stopping just after the road/sidewalk. All stormwater conveyance on low -density projects shall be vegetated conveyances. 15A NCAC 02H.1005. The pipe between lots 5 & 6 needs to be a swale. 3. Please clarify the information for 5:1 trapezoidal swales. Plan SW-1 has an 'open channel detail' with the 2 ft bottom dimensioned and the guidelines do not line up to the bottom for 2 ft. The note on plan SW-1 in lot 2 calls out the 5:1 swale typical and the top is labeled as 7.5 ft wide and the detail at the bottom of same plan dimensions the width at 15 ft - as does the detail on SE-4. Please remove the detail for 3:1 V bottom swale on Plan DE-4. All plans need to report consistent information. The swales between lots need to be the 5:1 trapezoidal swale since they receive the curb outlet Stormwater runoff. The swale at the back of the lots needs to be the 5:1 trapezoidal swale since this is SA waters. 4. Please verify the built -upon area (bua) associated with the lot for the lift station. Typically there is bua associated with a road and personnel access, pump pad, manholes, etc... Please account for the bua associated with the lift station lot on the table for the deed restrictions, plan SPA, and application page 2, etc... for all application documents. 5. Please revise the low -density supplement, section II calculation box on page 2 for the revised bua submitted April 27, 2009. The bua for roads changed. Include the number of lots proposed and the maximum allowable for lots. 6. Please provide the revised built -upon area table for each lot as a separate sheet. The table was provided on plan SPA and the application needs an 8'/ x 11 version included with the deed restrictions. Please note that the bua data on SPA reports one (1) square foot short on the impervious subtotal for lots at the bottom. The bua table on page 2 of the application, Section III (9) reports 36,687 + 2081 = 38,768 sf and Plan SPA reports 38,767sf. Wilmington Regional Office 127 Cardinal Drive Extension, Wilmington, North Carolina 28405 One Phone 910-796-72151 FAX: 910-350-20041 Customer service: 1-877-623-6748 North Carolina Internet:w .ncwaterquality.org a��`u1'/N���I, Naturally An Equal Opportunity l Affirmative Acton Employer 7. Please remember that a change to one number, detail, or label may have a domino effect on other numbers. Please check all plans, calculations and application forms and make changes as needed. Please note that this request for additional information is in response to a preliminary review. The requested information should be received in this Office prior to July 29, 2009, or the application will be returned as incomplete. The return of a project will necessitate re -submittal of all required items, including the application fee. If you need additional time to submit the information, please mail, email or fax your request for a time extension to the Division at the address and fax number at the bottom of this letter. The request must indicate the date by which you expect to submit the required information. The Division is allowed 90 days from the receipt of a completed application to issue the permit. The construction of any impervious surfaces, other than a construction entrance under an approved Sedimentation Erosion Control Plan, is a violation of NCGS 143-215.1 and is subject to enforcement action pursuant to NCGS 143-215.6A. Please reference the State assigned project number on all correspondence. Any original documents that need to be revised have been sent to the engineer or agent. All original documents must be returned or new originals must be provided. Copies are not acceptable. If you have any questions concerning this matter please feel free to call me at (910) 796-7215 or email me at mary.Naugle(a ncmail.net. Sincerely, (�q �qt n U 11 p��\�Y1Q Mary Jean Naugle (� l" GDS/mjn: S:\WQS\STORMWATER\adinfo\2009\090120 jun09 cc: William Gold, P.E., Meridian Engineering, P.A., 252-522-2587, fax: 2501 WiRO Page 2 of 2 1 cjieQ& 1 ENGINEERING 388 MCCOTTER BLVD, HAVELOCK,NC 28532 252-349-5803, 252-444-5765 April 21, 2009 Ms Mary Jean Naugle North Carolina Division of Water Quality Wilmington Regional Office t2? L327 Cardinal Drive Extension 1 Wilmington, NC 28405 Re: Scotts Farm Subdivision Review Carteret County Mary Jean, APR 2 7 2009 BY: 1 �t We received your comments regarding Scotts Farm Subdivision, Morehead City, Carteret County, North Carolina and have addressed each as follows: COMMENT 1: Please either delineate all wetlands on site, disturbed or undisturbed, or note on the plans that none exist. It appears there are no wetlands on site. If so, please add the note on the plans: "no wetlands are within the permit area". RESPONSE 1: "No wetlands are within the permit area" note added to plan, see sheets SP-5 o and SW-1. COMMENT 2: Please locate all stormwater systems, including, swales, in access/drainage easements, to be recorded and label the typical location and width on the plan #S-5. For example the rear lot easement is labeled but none for the drainage system along the road or between each lot line. A 10 foot setback appears to be provided along each lot line, but since there is Stormwater drainage routed along each lot line, the drainage easement and width needs to be labeled on the plans. RESPONSE 2: Stormwater easements have been revised, see sheets SP-4, SP-5, and SW-1. ,COMMENT 3: Please initial checklist on page 1 of the curb outlet supplement. RESPONSE 3: Checklist of curb outlet supplement initialed, see attached. COMMENT 4: Since this is a low density project, there is no collection system allowed, please limit piping to the minimum required to cross under roads. Please eliminate the pipe between lots 5 & 6 that is reported on plans SP-5, SW-1, SE-1. Plan SE-2 shows the pipe stopping just after the road/sidewalk. RESPONSE 4: This culvert is for pass through flow only. All road drainage for this project enters the proposed bmp through curb cuts, into side lot swales and into rear lot swales. Each with 5:1 side slopes in easements. COMMENT 5: Provide dimensions and sizing calculations for the outlet protection on each stormwater outlet. A typical rip rap detail is provided on SE-5, but no dimensions or calculations are provided for sizing basis to demonstrate diffuse flow at non -erosive velocity. Please provide a table of dimensions for each outlet protection on the plans and label each with a corresponding number. RESPONSE 5: The outlet protection and rock check dam were included as temporary erosion and sediment control measures only. Velocities calculations were included in stormwater submission, seepages 27-30. The 10 year 24 hour were V max = 3.01fps and Vave = 1.42 fps. However, as the additional impervious area has been added swale calculations were revised. Revised velocity calculations-are-incluiled,-V maz =-2.-7 fp' s and Vave = 0.79 fps. Both are non - erosive, as such permanent outlet protection was not necessary. COMMENT 6: Please label the location of the 5:1 trapezoidal swales. Plan SE4 has a detail for a 3:1 v-0 bottom Swale and there is no labeling on plan SP-5 to determine where the 5:1 J trapezoidal Swale is located. All plans need to report consistent information. The swales between �� lots need to be the 5:1 trapezoidal swale since they receive the curb outlet Stormwater runoff. 7 The swale at the back of the lots needs to be the 5:1 trapezoidal swale since this is SA waters. RESPONSE 6: All swales along the rear and side lot lines are 5:1, see sheets SP-4, SP-5 and SW-1, per contours, spots and details and calculations. COMMENT 7: Please consider reporting the built -upon area for each lot in whole numbers. For example: Lot Number BUA (square feet) 1 2,062 2 through 15 2,121 16 2,214 17 2,411 18 2,402 This rounding to whole numbers of the BUA on each lot would revise the building BUA to 38,783 sf and the total to 85,934 sf. You may want to add the additional BUA of 3,048 sf to the BUA total on the table on the application page 2 section 111 (9) as "future". This would take the project to 25% density limit and give some contingency. Just add the 3,048 sf of future BUA on the application table on the row labeled "other on -site (sf)". RESPONSE T BUAs figures and calculations have been revised accordingly and added to sheet SP-1. The additional impervious was added to stormwater application as future, see attached COMMENT 8: Please remember that a change to one number, detail, or label may have a domino effect on other numbers. Please check all plans, calculations and application forms and make changes as needed. RESPONSE 8: So noted. Thank you in advance for you time and consideration. With all our regards, ,9,'� -9,YJ�" Susan L. Sayger, PE, dXl%,AV Engineering William Gold, PE, Meridian Engineering, P.A Scott's Farm Subdivision Low Density -Curb Outlet -Grassed swalc Morehead City, Carteret County North Carolina INTRODUCTION This narrative discusses the low density stormwater permit application for the Scott's Farm Subdivision project, which was approved by the City of Morehead Planning Board on November 20, 2007 (see attached letter). The plan includes construction of a 18-lot single family residential subdivision on a 8.18-arce parcel located off Ashley Drive, near Country Club Road, Morehead City, Carteret County, North Carolina. The attached plan and calculations are for details of curb outlet and trapezoidal shaped, grassed swale system which outfalls into an existing swale along the southern boundary. EXISTING/PROPOSED CONDITIONS The existing topography of the parcel is relatively flat and drains at a minimum grade of 1% to the center of the site and into an existing ditch. The site drains less than one half mile to the Newport River, classified as a SA/HQW. In general, the design maintains the existing drainage pattern. The site proposes 88,862 sqft of impervious surfaces out of 8.18 acres, or 24.95%, less than 25% impervious surfaces. As such, stormwater is being managed and permitted under the curb outlet, low density option. The site is designed so that all stormwater from the proposed road (Ashley Drive) drains towards and through the curb cut outlets at each lot. From the curb cuts, runoff drains into swales and into the trapezoidal grassed swales. The trapezoidal swales have a longitudinal slope of 0.5%, a two - foot bottom width and 5:1 side slopes. As seen in the attached routings the 10 year event depth is 0.7- foot resulting in over one-half foot freeboard at 2.7 feet per second, maximum velocity. MAJOR DESIGN ELEMENTS Swale Parameters The channel was design in accordance with NC DENR DQW major design elements. The proposed channels is in three segments which are approximately 1,600 total feet (greater than 150 feet), draining towards the existing center at a 0.5% slope. With a two -foot bottom and 5:1 side slopes the 10 year maximum depth is 0.7-foot. The channel is 1.3' deep and will provide 0.5 feet of freeboard. At the downstream end where the proposed swales discharge into the existing channel, the 10 year velocity is cf,C1�cGf�piG 388 McODuer Blvd., Havelock, NC 28532 PLANNIN,O,_DESIO N., EN OIN EERING Scott's Farm Subdivision Low Density -Curb Cutlet -Grassed swale Morehead City, Carteret County North Carolina also non -erosive at 2.7 fps (See attached calculations). The BMP is located within a drainage easement to be recorded. • The 10-year pre -development runoff= 23 cfs • The 10-year post development runof€ 29 cfs • The 10-year post -development maximum velocity = 2.7 fps • Provided channel length = over 1,600 ft, greater than 150 feet • Provided channel slope = 0.5% • Provided channel side slopes = 5:1 • Provided freeboard = 0.5 feet • Recorded easement and maintenance agreement CONCLUSION Supporting Documentation (Pre-Dev Route) (Route) (Route) (Plan set) (Plan set) (Plan set) (Plan set/channel talc) (Plan set) The proposed design is for 8.18 total acre site for a 18 lot single family residential subdivision. All impervious surfaces will drain to curb cuts and overland to the BMP grassed, trapezoidal swalcs. The proposed BMP contains the required event, design parameters, freeboard, meeting or exceeding all DENR size, depth and volume requirements. Susan H. Sayger,PE KSMJ,pllc/Meridian Engineering PA 388 McCotter Blvd, Havelock, NC 28532 252-349-5803,252-444-5765 "'Wo,IIIII n C ARC L L o 31 4 GC C)C1fCYPL 388 McCotter Blvd., Havelock, NC 28532 PLAN NIN_G,,_DE5113 N�, ENGINEERING, reach ab rea h ab reach ab. (new Reach) J�k cam# ?0o �� 9 SUbCa Reach Pond Link Drainage Diagram for algold3ROUTEfinal4-21reachab Prepared by KsMj Engineering, 388 McCotter Blvd.Havelxk,NC26532 HydroCADO a.OD sln 004746 0 2006 HydroCAD Software SolAons LLC C:\algold3\ Reachab,Rvsd BUA, 10yr velcalc,Scotl algold3ROUTEfinal4-21reachab Rainfall Duration=60 min, Inten=7.00 in/i Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page HydroCADO 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Subcatchment reach ab: reach ab Runoff = 11.67 cfs @ 0.17 hrs, Volume= 42,014 cf, Depth= 3.64" Runoff by Rational method, Rise/Fall=1.0/1.0 xTc, Time Span= 0.00-24.00 hrs, dt= Rainfall Duration=60 min, Inten=7.00 in/hr Area (sf) C 34,557 0.90 Paved parking & roofs 103,950 0.40 50-75% Grass cover, Fair, HSG B 138,507 0.52 Weighted Average 138,507 0.52 Pervious Area C:\algold3\ Reachab,Rvsd BUA,10yr velcalc,Scotts algold3ROUTEfinal4-21reachab Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 2 HydroCAD@ 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Area Listing (all nodes) Area (sg_rft) C Description (subcats) 103,950 0.40 50-75% Grass cover, Fair, HSG B (reach ab) 34,557 0.90 Paved parking & roofs (reach ab) 138,507 C:\algold3\ Reachab,Rvsd BUA,10yr velcalc,Scotts algold3ROUTEfinal4-21reachab Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 4 HydroCADO 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Hydrograph for Subcatchment reach ab: reach ab Time Runoff (hours) (cfs) 0.00 0.00 0.50 11.67 1.00 11.67 1.50 0.00 2.00 0.00 2.50 0.00 3.00 0.00 3.50 0.00 4.00 0.00 4.50 0.00 5.00 0.00 5.50 0.00 6.00 0.00 6.50 0.00 7.00 0.00 7.50 0.00 8.00 0.00 8.50 0.00 9.00 0.00 9.50 0.00 10.00 0.00 10.50 0.00 11.00 0.00 11.50 0.00 12.00 0.00 12.50 0.00 13.00 0.00 13.50 0.00 14.00 0.00 14.50 0.00 Time Runoff (hours) (cfs) 15.00 0.00 15.50 0.00 16.00 0.00 16.50 0.00 17.00 0.00 17.50 0.00 18.00 0.00 18.50 0.00 19.00 0.00 19.50 0.00 20.00 0.00 20.50 0.00 21.00 0.00 21.50 0.00 22.00 0.00 22.50 0.00 23.00 0.00 23.50 0.00 24.00 0.00 C:\algold3\ Reachab,Rvsd BUA, 10yr velcalc,Scotts algold3ROUTEfinal4-21reachab Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 5 HydroCAD® 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Reach reach ab.: (new Reach) Inflow Area = 138,507 sf, Inflow Depth = 3.64" Inflow = 11.67 cfs @ 0.17 hrs, Volume= 42,014 cf Outflow = 11.67 cfs @ 1.06 hrs, Volume= 42,014 cf, Atten= 0%, Lag= 53.4 mu Routing by Stor-Ind+Trans method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Max. Velocity= 2.77 fps, Min. Travel Time= 4.0 min qk— 4h v 0` Avg. Velocity = 0.79 fps, Avg. Travel Time=14.0 min ' Peak Storage= 2,781 cf @ 1.00 hrs, Average Depth at Peak Storage= 0.74' Bank -Full Depth=1.40', Capacity at Bank -Full= 50.74 cfs 2.00' x 1.40' deep channel, n= 0.022 Earth, clean & straight Side Slope Z-value= 5.0 '/' Top Width=16.00' Length= 660.0' Slope= 0.0050 '/' Inlet Invert= 6.00', Outlet Invert= 2.70' C:\algold3\ Reachab,Rvsd BUA,10yr velcalc,Scotts algold3ROUTEfinal4-21reachab Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 6 HydroCAD® 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Hydrograph for Reach reach ab.: (new Reach) Time Inflow Storage Elevation Outflow (hours) (cfs) (cubic -feet) (feet) (cfs) 0.00 0.00 0 6.00 0.00 1.00 11.67 2,781 6.74 11.67 2.00 0.00 29 6.02 0.02 3.00 0.00 6 6.00 0.00 4.00 0.00 1 6.00 0.00 5.00 0.00 0 6.00 0.00 6.00 0.00 0 6.00 0.00 7.00 0.00 0 6.00 0.00 8.00 0.00 0 6.00 0.00 9.00 0.00 0 6.00 0.00 10.00 0.00 0 6.00 0.00 11.00 0.00 0 6.00 0.00 12.00 0.00 0 6.00 0.00 13.00 0.00 0 6.00 0.00 14.00 0.00 0 6.00 0.00 15.00 0.00 0 6.00 0.00 16.00 0.00 0 6.00 0.00 17.00 0.00 0 6.00 0.00 18.00 0.00 0 6.00 0.00 19.00 0.00 0 6.00 0.00 20.00 0.00 0 6.00 0.00 21.00 0.00 0 6.00 0.00 22.00 0.00 0 6.00 0.00 23.00 0.00 0 6.00 0.00 24.00 0.00 0 6.00 0.00 C:\algold3\ Reachab,Rvsd BUA,10yr velcalc,Scotts algold3ROUTEfinal4-21reachab Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 7 HydroCAD® 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Stage -Discharge for Reach reach ab.: (new Reach) Elevation Velocity Discharge (feet) (ft/sec) (cfs) 6.00 0.00 0.00 6.05 0.60 0.07 6.10 0.91 0.23 6.15 1.14 0.47 6.20 1.34 0.80 6.25 1.51 1.23 6.30 1.67 1.76 6.35 1.82 2.39 6.40 1.96 3.14 6.45 2.09 4.00 6.50 2.22 5.00 6.55 2.34 6.12 6.60 2.46 7.38 6.65 2.57 8.78 6.70 2.68 10.33 6.75 2.79 12.04 6.80 2.90 13.91 6.85 3.00 15.94 6.90 3.10 18.15 6.95 3.20 20.53 7.00 3.30 23.09 7.05 3.39 25.84 7.10 3.49 28.78 7.15 3.58 31.92 7.20 3.67 35.26 7.25 3.76 38.81 7.30 3.85 42.56 7.35 3.94 46.54 7.40 4.03 50.74 u C:\algold3\ Reachab,Rvsd BUA,10yr velcalc,Scotts algold3ROUTEfinal4-21reachab Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 8 HydroCADO 8.00 s/n 004746 © 2006 HydroCAD Software Solufions LLC Stage -Area -Storage for Reach reach ab.: (new Reach) Elevation End -Area Storage (feet) (sq-ft) (cubic -feet) 6.00 0.0 0 6.05 0.1 74 6.10 0.3 165 6.15 0.4 272 6.20 0.6 396 6.25 0.8 536 6.30 1.1 693 6.35 1.3 866 6.40 1.6 1,056 6.45 1.9 1,262 6.50 2.3 1,485 6.55 2.6 1,724 6.60 3.0 1,980 6.65 3.4 2,252 6.70 3.9 2,541 6.75 4.3 2,846 6.80 4.8 3,168 6.85 5.3 3,506 6.90 5.9 3,861 6.95 6.4 4,232 7.00 7.0 4,620 7.05 7.6 5,024 7.10 8.3 5,445 7.15 8.9 5,882 7.20 9.6 6,336 7.25 10.3 6,806 7.30 11.1 7,293 7.35 11.8 7,796 7.40 12.6 8,316 reach c. rea h c reach c (new Reach) ZA I SUbCa Reach Pond Link Drainage Diagram for algold3ROUTEfinal4-21 reachc Prepared by KsMj Engineering, 388 McCotter Blvd.Havelock,NC28532 HydroCAD98.00 sin OD4746 02006 HydroCAD Software Solutions LLC C:\algold3\ algold3ROUTEfinal4-21reachc reach, revsd BUA, 10yr vel cal c, Scotts Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 2 HydroCAD® 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Area (eft) C 59,400 0.40 19,747 0.90 79,147 Area Listing (all nodes) Description (subcats) 50-75% Grass cover, Fair, HSG B (reach c.) Paved parking & roofs (reach c.) C:\algold3\ reach, revsd BUA,10yr vel calc, Scotts algold3ROUTEfina14-21reachc Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 3 HydroCAD@ 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Subcatchment reach c.: reach c Runoff = 6.67 cfs @ 0.17 hrs, Volume= 24,008 cf, Depth= 3.64" Runoff by Rational method, Rise/Fall=1.0/1.0 xTc, Time Span= 0.00-3.00 hrs, dt= 0.01 hrs Rainfall Duration=60 min, Inten=7.00 in/hr Area (so C Description 19,747 0.90 Paved parking & roofs 59,400 0.40 50-75% Grass cover, Fair, HSG B 79,147 0.52 Weighted Average 79,147 0.52 Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, C:\algold3\ reach, revsd BUA, 10yr vel calc, Scotts algold3ROUTEfina14-21reachc Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 4 HydroCAD® 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Hydrograph for Subcatchment reach c.: reach c Time Runoff (hours) (cfs) 0.00 0.00 0.05 2.00 0.10 4.00 0.15 6.00 0.20 6.67 0.25 6.67 0.30 6.67 0.35 6.67 0.40 6.67 0.45 6.67 0.50 6.67 0.55 6.67 0.60 6.67 0.65 6.67 0.70 6.67 0.75 6.67 0.80 6.67 0.85 6.67 0.90 6.67 0.95 6.67 1.00 6.67 1.05 4.67 1.10 2.67 1.15 0.67 1.20 0.00 1.25 0.00 1.30 0.00 1.35 0.00 1.40 0.00 1.45 0.00 Time Runoff (hours) (cfs) 1.50 0.00 1.55 0.00 1.60 0.00 1.65 0.00 1.70 0.00 1.75 0.00 1.80 0.00 1.85 0.00 1.90 0.00 1.95 0.00 2.00 0.00 2.05 0.00 2.10 0.00 2.15 0.00 2.20 0.00 2.25 0.00 2.30 0.00 2.35 0.00 2.40 0.00 2.45 0.00 2.50 0.00 2.55 0.00 2.60 0.00 2.65 0.00 2.70 0.00 2.75 0.00 2.80 0.00 2.85 0.00 2.90 0.00 2.95 0.00 Time Runoff (hours) (cfs) 3.00 0.00 C:\algold3\ reach, revsd BUA, 10yr vel calc, Scotts algold3ROUTEfina14-21reachc Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 5 HydroCAD@ 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Reach reach c: (new Reach) Inflow Area = 79,147 sf, Inflow Depth = 3.64" Inflow = 6.67 cfs @ 0.17 hrs, Volume= 24,008 cf Outflow = 6.67 cfs @ 1.03 hrs, Volume= 24,008 cf, Atten= 0%, Lag-- 51.6 mu Routing by Stor-Ind+Trans method, Time Span= 0.00-3.00 hrs, dt= 0.01 hrs Max. Velocity= 2.40 fps, Min. Travel Time= 2.2 min Avg. Velocity =1.09 fps, Avg. Travel Time= 4.9 min Peak Storage= 891 cf @ 1.00 hrs, Average Depth at Peak Storage= 0.57' Bank -Full Depth=1.40', Capacity at Bank -Full= 50.74 cfs 2.00' x 1.40' deep channel, n= 0.022 Earth, clean & straight Side Slope Z-value= 5.0 '/' Top Width=16.00' Length= 320.0' Slope= 0.00507 Inlet Invert-- 6.00', Outlet Invert-- 4.40' C:\algold3\ reach, revsd BUA,10yr vel calc, Scotts algold3ROUTEfinal4-21reachc Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 6 HydroCAD® 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Hydrograph for Reach reach c: (new Reach) Time Inflow Storage Elevation Outflow (hours) (cfs) (cubic -feet) (feet) (cfs) 0.00 0.00 0 6.00 0.00 0.20 6.67 853 6.56 5.24 0.40 6.67 891 6.57 6.67 0.60 6.67 891 6.57 6.67 0.80 6.67 891 6.57 6.67 1.00 6.67 891 6.57 6.67 1.20 0.00 169 6.18 1.55 1.40 0.00 27 6.04 0.06 1.60 0.00 11 6.02 0.01 1.80 0.00 6 6.01 0.01 2.00 0.00 3 6.00 0.00 2.20 0.00 2 6.00 0.00 2.40 0.00 1 6.00 0.00 2.60 0.00 1 6.00 0.00 2.80 0.00 0 6.00 0.00 3.00 0.00 0 6.00 0.00 C:\algold3\ reach, revsd BUA, 10yr vel calc, Scotts algold3ROUTEfinal4-21reachc Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 7 HydroCAD® 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Stage -Discharge for Reach reach c: (new Reach) Elevation Velocity Discharge (feet) (ft/sec) (cfs) 6.00 0.00 0.00 6.05 _ 0.60 0.07 6.10 0.91 0.23 6.15 1.14 0.47 6.20 1.34 0.80 6.25 1.51 1.23 6.30 1.67 1.76 6.35 1.82 2.39 6.40 1.96 3.14 6.45 2.09 4.00 6.50 2.22 5.00 6.55 2.34 6.12 6.60 2.46 7.38 6.65 2.57 8.78 6.70 2.68 10.33 6.75 2.79 12.04 6.80 2.90 13.91 6.85 3.00 15.94 6.90 3.10 18.15 6.95 3.20 20.53 7.00 3.30 23.09 7.05 3.39 25.84 7.10 3.49 28.78 7.15 3.58 31.92 7.20 3.67 35.26 7.25 3.76 38.81 7.30 3.85 42.56 7.35 3.94 46.54 7.40 4.03 50.74 C:\algold3\ reach, revsd BUA, 10yr vel calc, Scotts algold3ROUTEfinal4-21reachc Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 8 HydroCAD® 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Stage -Area -Storage for Reach reach c: (new Reach) Elevation End -Area Storage (feet) (sq-ft) (cubic -feet) 6.00 0.0 0 6.05 0.1 36 6.10 0.3 80 6.15 0.4 132 6.20 0.6 192 6.25 0.8 260 6.30 1.1 336 6.35 1.3 420 6.40 1.6 512 6.45 1.9 612 6.50 2.3 720 6.55 2.6 836 6.60 3.0 960 6.65 3.4 1,092 6.70 3.9 1,232 6.75 4.3 1,380 6.80 4.8 1,536 6.85 5.3 1,700 6.90 5.9 1,872 6.95 6.4 2,052 7.00 7.0 2,240 7.05 7.6 2,436 7.10 8.3 2,640 7.1.5 8.9 2,852 7.20 9.6 3,072 7.25 10.3 3,300 7.30 11.1 3,536 7.35 11.8 3,780 7.40 12.6 4,032 cKd990,llf ENGINEERING 388 MCCOTTER BLVD, HAVELOCK,NC 28532 252-349-5803, 252-444-5765 April 21, 2009 Ms Mary Jean Naugle North Carolina Division of Water Quality Wilmington Regional Office 127 1-3i4-Cardinal Drive Extension Wilmington, NC 28405 Re: Scotts Farm Subdivision Review Carteret County Mary Jean, We received your comments regarding Scotts Farm Subdivision, Morehead City, Carteret County, North Carolina and have addressed each as follows: COMMENT 1: Please either delineate all wetlands on site, disturbed or undisturbed, or note on the plans that none exist. It appears there are no wetlands on site. If so, please add the note on the plans: "no wetlands are within the permit area". RESPONSE 1: "No wetlands are within the permit area" note added to plan, see sheets SP-5 and SW-1. COMMENT 2: Please locate all stormwater systems, including, swales, in access/drainage easements, to be recorded and label the typical location and width on the plan #S-5. For example the rear lot easement is labeled but none for the drainage system along the road or between each lot line. A 10 foot setback appears to be provided along each lot line, but since there is Stormwater drainage routed along each lot line, the drainage easement and width needs to be labeled on the plans. RESPONSE 2: Stormwater easements have been revised, see sheets SP-4, SP-5, and SW-1. COMMENT 3: Please initial checklist on page 1 of the curb outlet supplement. RESPONSE 3: Checklist of curb outlet supplement initialed, see attached. COMMENT 4: Since this is a low density project, there is no collection system allowed, please limit piping to the minimum required to cross under roads. Please eliminate the pipe between lots 5 & 6 that is reported on plans SP-5, SW-1, SE-1. Plan SE-2 shows the pipe stoppingjust after the road/sidewalk. RESPONSE 4: This culvert is for pass through flow only. All road drainage for this project enters the proposed bmp through curb cuts, into side lot swales and into rear lot swales. Each with 5:1 side slopes in easements. Cr�vT_`.�iL APR 8 7 2009 P-W COMMENT 5: Provide dimensions and sizing calculations for the outlet protection on each stormwater outlet. A typical rip rap detail is provided on SE-5, but no dimensions or calculations are provided for sizing basis to demonstrate diffuse flow at non -erosive velocity. Please provide a table of dimensions for each outlet protection on the plans and label each with a corresponding number. RESPONSE 5: The outlet protection and rock check dam were included as temporary erosion and sediment control measures only. Velocities calculations were included in stormwater submission, see pages 27-30. The 10 year, 24 hour were V max = 3.Olfps and Vave = 1.42 fps. However, as the additional impervious area has been added, swale calculations were revised. Revised velocity calculations are included, V max = 2.7 fps and Vave = 0.79 fps. Both are non - erosive, as such permanent outlet protection was not necessary. COMMENT 6: Please label the location of the 5:1 trapezoidal swales. Plan SE-4 has a detail for a 3:1 v-0 bottom swale and there is no labeling on plan SP-5 to determine where the 5:1 trapezoidal swale is located. All plans need to report consistent information. The swales between lots need to be the 5:1 trapezoidal swale since they receive the curb outlet Stormwater runoff. The Swale at the back of the lots needs to be the 5:1 trapezoidal swale since this is SA waters. RESPONSE 6: All swales along the rear and side lot lines are 5:1, see sheets SP-4, SP-5 and SW-1, per contours, spots and details and calculations. COMMENT 7: Please consider reporting the built -upon area for each lot in whole numbers. For example: Lot Number BUA (square feet) 1 2,062 2 through 15 2,121 16 2,214 17 2,411 18 2,402 This rounding to whole numbers of the BUA on each lot would revise the building BUA to 38,783 sf and the total to 85,934 sf. You may want to add the additional BUA of 3,048 sf to the BUA total on the table on the application page 2 section 111 (9) as "future". This would take the project to 25% density limit and give some contingency. Just add the 3,048 sf of future BUA on the application table on the row labeled "other on -site (sf)". RESPONSE 7: BUAs figures and calculations have been revised accordingly and added to sheet SP-l. The additional impervious was added to stormwater application as future, see attached. COMMENT 8: Please remember that a change to one number, detail, or label may have a domino effect on other numbers. Please check all plans, calculations and application forms and make changes as needed. RESPONSE 8: So noted. Thank you in advance for you time and consideration. With all our regards, �ea2 � �y�lrr Susan L. Sayger, PE, c%Cc9u�fl� Engineering William Gold, PE, Meridian Engineering, P.A Scott's Farm Subdivision APR 2 7 2009 Low Density -Curb Outlet -Grassed swale Morehead City, Carteret County North Carolina BY: INTRODUCTION This narrative discusses the low density stormwater permit application for the Scott's Farm Subdivision project, which was approved by the City of Morehead Planning Board on November 20, 2007 (see attached letter). The plan includes construction of a 18-lot single family residential subdivision on a 8.18-arce parcel located off Ashley Drive, near Country Club Road, Morehead City, Carteret County, North Carolina. The attached plan and calculations are for details of curb outlet and trapezoidal shaped, grassed Swale system which outfalls into an existing swale along the southern boundary. The existing topography of the parcel is relatively flat and drains at a minimum grade of 1% to the center of the site and into an existing ditch. The site drains less than one half mile to the Newport River, classified as a SA/HQW. In general, the design maintains the existing drainage pattern. The site proposes 88,862 sgft of impervious surfaces out of 8.18 acres, or 24.95%, less than 25% impervious surfaces. As such, stormwater is being managed and permitted under the curb outlet, low density option. The site is designed so that all stormwater from the proposed road (Ashley Drive) drains towards and through the curb cut outlets at each lot. From the curb cuts, runoff drains into swales and into the trapezoidal grassed swales. The trapezoidal swales have a longitudinal slope of 0.5%, a two - foot bottom width and 5:1 side slopes. As seen in the attached routings the 10 year event depth is 0.7- foot resulting in over one-half foot freeboard at 2.7 feet per second, maximum velocity. MAJOR DESIGN ELEMENTS Swale Parameters The channel was design in accordance with NC DENR DQW major design elements. The proposed channels is in three segments which are approximately 1,600 total feet (greater than 150 feet), draining towards the existing center at a 0.5% slope. With a two -foot bottom and 5:1 side slopes the 10 year maximum depth is 0.7-foot. The channel is 1.3' deep and will provide 0.5 feet of freeboard. At the downstream end where the proposed swales discharge into the existing channel, the 10 year velocity is 388 McConer Blvd., Havelock, NC 28532 PLANNIN.G.,_DEBIG N,r, ENGINEERING, Scott's Farm Subdivision Low Density -Curb Outlet -Grassed swale Morehead City, Carteret County North Carolina also non -erosive at 2.7 fps (See attached calculations). The BMP is located within a drainage easement to be recorded. • The 10-year pre -development runoff= 23 cfs • The 10-year post development runoff 29 cfs • The 10-year post -development maximum velocity = 2.7 fps • Provided channel length = over 1,600 ft, greater than 150 feet • Provided channel slope = 0.5% • Provided channel side slopes = 5:1 • Provided freeboard = 0.5 feet • Recorded easement and maintenance agreement CONCLUSION Supporting Documentation (Pre-Dev Route) (Route) (Route) (Plan set) (Plan set) (Plan set) (Plan set/channel calc) (Plan set) The proposed design is for 8.18 total acre site for a 18 lot single family residential subdivision. All impervious surfaces will drain to curb cuts and overland to the BMP grassed, trapezoidal swales. The proposed BMP contains the required event, design parameters, freeboard, meeting or exceeding all DENR size, depth and volume requirements. Susan H. Sayger,PE AL KSMJ,pllc/Meridian Engineering PA = 31 ` 4 388 McCotter Blvd, Havelock, NC 28532 252-349-5803,252444-5765 9��c4f�pdG; 388 McC tier Blvd., Havelock, NC 28532 PLANNIN, G.,_DESIG N,, ENOI,N EER.IN6 reach ab rea I h ab reach ab. (new Reach) gECEI'�rED APR Q 7 2009 BY- Subca Reach Pond Link Drainage Diagram for algold3ROUTEfinai4-21reachab Prepared by KsMj Engineering, 3BB McCarter Blvd. Havelock, NC28532 HydroCAD®8.00 s/n 004746 0 2006 HydroCAO Software Solutions LLC C:\algold3\ Reachab,Rvsd BUA,10yr velcalc,Scotts algold3ROUTEfinal4-21reachab Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 2 HydroCADO 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Area (soft) C 103,950 0.40 34,557 0.90 138,507 Area Listing (all nodes) Description (subcats) 50-75% Grass cover, Fair, HSG B (reach ab) Paved parking & roofs (reach ab) C:\algold3\ Reachab,Rvsd BUA, 10yr velcalc,Scotts algold3ROUTEfinal4-21reachab Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 3 HydroCADO 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Subcatchment reach ab: reach ab Runoff = 11.67 cfs @ 0.17 hrs, Volume= 42,014 cf, Depth= 3.64" Runoff by Rational method, Rise/Fa11=1.0/1.0 xTc, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Rainfall Duration=60 min, Inten=7.00 in/hr Area (so C Description 34,557 0.90 Paved parking & roofs 103,950 0.40 50-75% Grass cover, Fair, HSG B 138,507 0.52 Weighted Average 138,507 0.52 Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, C:\algold3\ Reachab,Rvsd BUA, 10yr velcalc,Scotts algold3ROUTEfinal4-21reachab Rainfall Duration=60 min, lnten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter Blvd.Havelock,NC28532 Page 4 HydroCADO 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Hydrograph for Subcatchment reach ab: reach ab Time Runoff (hours) (cfs) 0.00 0.00 0.50 11.67 1.00 11.67 1.50 0.00 2.00 0.00 2.50 0.00 3.00 0.00 3.50 0.00 4.00 0.00 4.50 0.00 5.00 0.00 5.50 0.00 6.00 0.00 6.50 0.00 7.00 0.00 7.50 0.00 8.00 0.00 8.50 0.00 9.00 0.00 9.50 0.00 10.00 0.00 10.50 0.00 11.00 0.00 11.50 0.00 12.00 0.00 12.50 0.00 13.00 0.00 13.50 0.00 14.00 0.00 14.50 0.00 Time Runoff (hours) (cfs) 15.00 0.00 15.50 0.00 16.00 0.00 16.50 0.00 17.00 0.00 17.50 0.00 18.00 0.00 18.50 0.00 19.00 0.00 19.50 0.00 20.00 0.00 20.50 0.00 21.00 0.00 21.50 0.00 22.00 0.00 22.50 0.00 23.00 0.00 23.50 0.00 24.00 0.00 C:\algold3\ Reachab,Rvsd BUA, 10yr velcalc,Scotts algold3ROUTEfinal4-21reachab Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 5 HydroCAD@ 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Reach reach ab.: (new Reach) Inflow Area = 138,507 sf, Inflow Depth = 3.64" Inflow = 11.67 cfs @ 0.17 hrs, Volume= 42,014 cf Outflow = 11.67 cfs @ 1.06 hrs, Volume= 42,014 cf, Atten= 0%, Lag-- 53.4 mu Routing by Stor-Ind+Trans method, Time Span= 0.00-24.00 hrs, dt= 0.01 hrs Max. Velocity= 2.77 fps, Min. Travel Time= 4.0 min Avg. Velocity = 0.79 fps, Avg. Travel Time=14.0 min Peak Storage= 2,781 cf @ 1.00 hrs, Average Depth at Peak Storage= 0.74' Bank -Full Depth=1.40', Capacity at Bank -Full= 50.74 cfs 2.00' x 1.40' deep channel, n= 0.022 Earth, clean & straight Side Slope Z-value= 5.0 7' Top Width=16.00' Length= 660.0' Slope= 0.0050 '/' Inlet Invert— 6.00', Outlet Invert= 2.70' C:\algold3\ Reachab,Rvsd BUA,10yr velcalc,Scotts algold3ROUTEfinal4-21reachab Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 6 HydroCAD® 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Hydrograph for Reach reach ab.: (new Reach) Time Inflow Storage Elevation Outflow (hours) (cfs) (cubic -feet) (feet) (cfs) 0.00 0.00 0 6.00 0.00 1.00 11.67 2,781 6.74 11.67 2.00 0.00 29 6.02 0.02 3.00 0.00 6 6.00 0.00 4.00 0.00 1 6.00 0.00 5.00 0.00 0 6.00 0.00 6.00 0.00 0 6.00 0.00 7.00 0.00 0 6.00 0.00 8.00 0.00 0 6.00 0.00 9.00 0.00 0 6.00 0.00 10.00 0.00 0 6.00 0.00 11.00 0.00 0 6.00 0.00 12.00 0.00 0 6.00 0.00 13.00 0.00 0 6.00 0.00 14.00 0.00 0 6.00 0.00 15.00 0.00 0 6.00 0.00 16.00 0.00 0 6.00 0.00 17.00 0.00 0 6.00 0.00 18.00 0.00 0 6.00 0.00 19.00 0.00 0 6.00 0.00 20.00 0.00 0 6.00 0.00 21.00 0.00 0 6.00 0.00 22.00 0.00 0 6.00 0.00 23.00 0.00 0 6.00 0.00 24.00 0.00 0 6.00 0.00 C:\algold3\ Reachab,Rvsd BUA, 10yr velcalc,Scotts algold3ROUTEfinal4-21reachab Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 7 HydroCAD® 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Stage -Discharge for Reach reach ab.: (new Reach) Elevation Velocity Discharge (feet) (ft/sec) (cfs) 6.00 0.00 0.00 6.05 0.60 0.07 6.10 0.91 0.23 6.15 1.14 0.47 6.20 1.34 0.80 6.25 1.51 1.23 6.30 1.67 1.76 6.35 1.82 2.39 6.40 1.96 3.14 6.45 2.09 4.00 6.50 2.22 5.00 6.55 2.34 6.12 6.60 2.46 7.38 6.65 2.57 8.78 6.70 2.68 10.33 6.75 2.79 12.04 6.80 2.90 13.91 6.85 3.00 15.94 6.90 3.10 18.15 6.95 3.20 20.53 7.00 3.30 23.09 7.05 3.39 25.84 7.10 3.49 28.78 7.15 3.58 31.92 7.20 3.67 35.26 7.25 3.76 38.81 7.30 3.85 42.56 7.35 3.94 46.54 7.40 4.03 50.74 C:\algold3\ Reachab,Rvsd BUA, 10yr velcalc,Scotts algold3ROUTEfina14-21reachab Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 8 HydroCAD® 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Stage -Area -Storage for Reach reach ab.: (new Reach) Elevation End -Area Storage (feet) (sq-ft) (cubic -feet) 6.00 0.0 0 6.05 0.1 74 6.10 0.3 165 6.15 0.4 272 6.20 0.6 396 6.25 0.8 536 6.30 1.1 693 6.35 1.3 866 6.40 1.6 1,056 6.45 1.9 1,262 6.50 2.3 1,485 6.55 2.6 1,724 6.60 3.0 1,980 6.65 3.4 2,252 6.70 3.9 2,541 6.75 4.3 2,846 6.80 4.8 3,168 6.85 5.3 3,506 6.90 5.9 3,861 6.95 6.4 4,232 7.00 7.0 4,620 7.05 7.6 5,024 7.10 8.3 5,445 7.15 8.9 5,882 7.20 9.6 6,336 7.25 10.3 6,806 7.30 11.1 7,293 7.35 11.8 7,796 7.40 12.6 8,316 reach c. rea h c reach c (new Reach) SUbCa Reach Pond Link Drainage Diagram for algold3ROUTEfinal4-21 reachc Fre pared by KsMj Engineering, 388 McCotter BIvd.Havelock,NC28532 HydroCAD® 8.00 sln 004746 0 2006 HydroCAD Software Solutions LLC C: \ algold3 \ algold3ROUTEfinal4-21reachc reach, revsd BUA, 10yr vel calc, Scotts Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 2 HydroCAD® 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Area Listing (all nodes) Area (q-ft) C Description (subcats) 59,400 0.40 50-75% Grass cover, Fair, HSG B (reach c.) 19,747 0.90 Paved parking & roofs (reach c.) 79,147 C:\algold3\ reach, revsd BUA, 10yr vel calc, Scotts algold3ROUTEfinal4-21reachc Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 3 HydroCAD@ 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Subcatchment reach c.: reach c Runoff = 6.67 cfs @ 0.17 hrs, Volume= 24,008 cf, Depth= 3.64" Runoff by Rational method, Rise/Fall=1.0/1.0 xTc, Time Span= 0.00-3.00 hrs, dt= 0.01 hrs Rainfall Duration=60 min, Inten=7.00 in/hr Area (so C Description 19,747 0.90 Paved parking & roofs 59,400 0.40 50-75% Grass cover, Fair, HSG B 79,147 0.52 Weighted Average 79,147 0.52 Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, C:\algold3\ reach, revsd BUA, 10yr vel calc, Scotts algold3ROUTEfinal4-21reachc Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 4 HydroCADO 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Hydrograph for Subcatchment reach c.: reach c Time Runoff (hours) (cfs) 0.00 0.00 0.05 2.00 0.10 4.00 0.15 6.00 0.20 6.67 0.25 6.67 0.30 6.67 0.35 6.67 0.40 6.67 0.45 6.67 0.50 6.67 0.55 6.67 0.60 6.67 0.65 6.67 0.70 6.67 0.75 6.67 0.80 6.67 0.85 6.67 0.90 6.67 0.95 6.67 1.00 6.67 1.05 4.67 1.10 2.67 1.15 0.67 1.20 0.00 1.25 0.00 1.30 0.00 1.35 0.00 1.40 0.00 1.45 0.00 Time Runoff (hours) (cfs) 1.50 0.00 1.55 0.00 1.60 0.00 1.65 0.00 1.70 0.00 1.75 0.00 1.80 0.00 1.85 0.00 1.90 0.00 1.95 0.00 2.00 0.00 2.05 0.00 2.10 0.00 2.15 0.00 2.20 0.00 2.25 0.00 2.30 0.00 2.35 0.00 2.40 0.00 2.45 0.00 2.50 0.00 2.55 0.00 2.60 0.00 2.65 0.00 2.70 0.00 2.75 0.00 2.80 0.00 2.85 0.00 2.90 0.00 2.95 0.00 Time Runoff (hours) (cfs) 3.00 0.00 C:\algold3\ reach, revsd BUA, 10yr vel calc, Scotts algold3ROUTEfinal4-21reachc Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter Blvd.Havelock,NC28532 Page 5 HydroCAD@ 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Reach reach c: (new Reach) Inflow Area = 79,147 sf, Inflow Depth = 3.64" Inflow = 6.67 cfs @ 0.17 hrs, Volume= 24,008 cf Outflow = 6.67 cfs @ 1.03 hrs, Volume= 24,008 cf, Atten= 0%, Routing by Stor-Ind+Trans method, Time Span= 0.00-3.00 hrs, dt= 0.01 hrs Max. Velocity= 2.40 fps, Min. Travel Time= 2.2 min Avg. Velocity =1.09 fps, Avg. Travel Time= 4.9 min Peak Storage= 891 cf @ 1.00 hrs, Average Depth at Peak Storage= 0.57' Bank -Full Depth=1.40', Capacity at Bank -Full= 50.74 cfs 2.00' x 1.40' deep channel, n= 0.022 Earth, clean & straight Side Slope Z-value= 5.0 '/' Top Width=16.00' Length= 320.0' Slope= 0.0050 '/' Inlet Invert= 6.00', Outlet Invert— 4.40' Lag-- 51.6 mn C:\algold3\ reach, revsd BUA, 10yr vel calc, Scotts algold3ROUTEfinaM-21reachc Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter Blvd.Havelock,NC28532 Page 6 HydroCAD® 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Hydrograph for Reach reach c: (new Reach) Time Inflow Storage Elevation Outflow (hours) (cfs) (cubic -feet) (feet) (cfs) 0.00 0.00 0 6.00 0.00 0.20 6.67 853 6.56 5.24 0.40 6.67 891 6.57 6.67 0.60 6.67 891 6.57 6.67 0.80 6.67 891 6.57 6.67 1.00 6.67 891 6.57 6.67 1.20 0.00 169 6.18 1.55 1.40 0.00 27 6.04 0.06 1.60 0.00 11 6.02 0.01 1.80 0.00 6 6.01 0.01 2.00 0.00 3 6.00 0.00 2.20 0.00 2 6.00 0.00 2.40 0.00 1 6.00 0.00 2.60 0.00 1 6.00 0.00 2.80 0.00 0 6.00 0.00 3.00 0.00 0 6.00 0.00 C:\algold3\ reach, revsd BUA, 10yr vel calc, Scotts algold3ROUTEfina14-21reachc Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 7 HydroCAD® 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Stage -Discharge for Reach reach c: (new Reach) Elevation Velocity Discharge (feet) (ft/sec) (cfs) 6.00 0.00 0.00 6.05 0.60 0.07 6.10 0.91 0.23 6.15 1.14 0.47 6.20 1.34 0.80 6.25 1.51 1.23 6.30 1.67 1.76 6.35 1.82 2.39 6.40 1.96 3.14 6.45 2.09 4.00 6.50 2.22 5.00 6.55 2.34 6.12 6.60 2.46 7.38 6.65 2.57 8.78 6.70 2.68 10.33 6.75 2.79 12.04 6.80 2.90 13.91 6.85 3.00 15.94 6.90 3.10 18.15 6.95 3.20 20.53 7.00 3.30 23.09 7.05 3.39 25.84 7.10 3.49 28.78 7.15 3.58 31.92 7.20 3.67 35.26 7.25 3.76 38.81 7.30 3.85 42.56 7.35 3.94 46.54 7.40 4.03 50.74 C:\algold3\ reach, revsd BUA, 10yr vel calc, Scotts algold3ROUTEfina14-21reachc Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 8 HydroCADO 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Stage -Area -Storage for Reach reach c: (new Reach) Elevation End -Area Storage (feet) (sq-ft) (cubic -feet) 6.00 0.0 0 6.05 0.1 36 6.10 0.3 80 6.15 0.4 132 6.20 0.6 192 6.25 0.8 260 6.30 1.1 336 6.35 1.3 420 6.40 1.6 512 6.45 1.9 612 6.50 2.3 720 6.55 2.6 836 6.60 3.0 960 6.65 3.4 1,092 6.70 3.9 1,232 6.75 4.3 1,380 6.80 4.8 1,536 6.85 5.3 1,700 6.90 5.9 1,872 6.95 6.4 2,052 7.00 7.0 2,240 7.05 7.6 2,436 7.10 8.3 2,640 7.15 8.9 2,852 7.20 9.6 3,072 7.25 10.3 3,300 7.30 11.1 3,536 7.35 11.8 3,780 7.40 12.6 4,032 1. .Specify whether project is (check one): ®New ❑Renewal []Modification 2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the existing permit number and its issue date (if known) 3. Specify the type of project (check one): ®Low Density []High Density ❑Redevelop ❑General Permit ❑Universal SMP []Other 4. Additional Project Requirements (check applicable blanks; information on required state permits can be obtained by contacting the Customer Service Center at 1-877-623-6748): ❑CAMA Major ®Sedimentation/Erosion Control ❑404/401 Permit ®NPDES Stormwater III. PROJECT INFORMATION 1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative (one to two pages) describing stormwater management for the project. The road surfaces of the 8.2ac site will drain into curbcuts and into grassed swales. The swales will drain into the trapezoidal grassed swales with 5:1 side slopes and longitudinal slope of 0.5%. All major design elements have 2. Stormwater runoff from this project drains to the Newport River basin. 3. Total Property Area: 8.18 acres 4. Total Wetlands Area: 0.0 acres 5. 100' Wide Strip of Wetland Area: acres (not applicable if no wetlands exist on site) 6. Total Project Area**:8.18 acres 7. Project Built Upon Area:24.95 % 8. How many drainage areas does the project have?i 9. Complete the following information for each drainage area. If there are more than two drainage areas in the project, attach an additional sheet with the information for each area provided in the same format as below. For high density projects, com lete the table with one drainage area for each engineered stormwater device. Basin Information Drainage Area 1 Drainage Area 2 Receiving Stream Name Newport River Stream Class 6r Index No. SA/HWQ Total Drainage Area (so 356,161 Rai C On -site Drainage Area (so 356,161 Off -site Drainage Area (so 0 APR 2 7 2009 Existing Impervious* Area (so Proposed Impervious*Area (so 88862 % Impervious* Area (total) 24.95 Impervious* Surface Area Drainage Area 1 Drainage Area 2 On -site Buildings (sf) 36,687 On -site Streets (so 48787 On -site Parking (so On -site Sidewalks (sf) 2081 9the"0-5ite (sf) U Off -site (sf) Total (so: 88862 Permit No. (to be provided by DWo State of North Carolina Department of Environment and Natural Resources Division of Water Quality STORMWATER MANAGEMENT PERMIT APPLICATION FORM CURB OUTLET SYSTEM SUPPLEMENT FOR LOW DENSITY DEVELOPMENT WITH CURB AND GUTTER This form may be photocopied for use as an original DWO Stormwater Management Plan Review: A complete stormwater management plan submittal includes a stormwater management permit application, a curb outlet system supplement, a low density supplement, design calculations, and plans and specifications showing all stormwater conveyances and curb outlet details. I. PROJECT INFORMATION Project Name : Scotts Farm Subdivision Contact Person: Sammie Ballou Phone Number: ( 252)241-7466 Curb outlets to (check one): ® Swale ❑ Vegetated Area II. REQUIRED ITEMS CHECKLIST The following checklist outlines design requirements per the North Carolina Administrative Code Section 15A NCAC 2H .1008, NCDENR BMP Manual (2007), and Session Law 2006-246. Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate that the following design requirements have been met and supporting documentation is attached. If the applicant has designated an agent on the Stormwater Management Permit Application Form, the agent may initial below. If a requirement has not been met, attach justification. Page/Plan Initials Sheet No. Sw-1 a. Curb outlets direct flow to a swale or vegetated area., 242451 b. Swales or vegetated areas receiving curb outlet flow are designed to carry, at a minimum, the peak flow from the 10-year storm. 242451 c. Flow velocity is non -erosive for peak flow from the 10-year storm event., SW-1 d. Longitudinal slope of the swale or vegetated area does not exceed 5%./ f� Sw-1 e. Side slopes of the Swale or vegetated area are no steeper than 5:1 (horizontal to vertical Sw-1 f. Length of swale or vegetated area is at least 100 feet., 242451 g. The system takes into account the run-off at ultimate built -out potential from all surfaces — draining to the system (delineate drainage area for each swale). SW-1 h. Swales are located in recorded drainage easements. SE-5 i. Grass type(s) for permanent vegetative cover specified on detail. Sw-1 j. Swale detail provided on plans. III. DESIGN INFORMATION Complete the following table. If additional space is needed the information should be provided in the same format as Table 1 and attached to this form. Rainfall intensity data can be found in Appendix 8.03 of the State of North Carolina Erosion and Sediment Control Planning and Design Manual. Table 1. Swale Design Information Swale No. Drainage Area (ac) Impervious Area (ac) Grassed Area (ac) C Q cfs Slope (%) Vallow ((fps) VWtual (fps) Flow Depth (ft 1 3.18 .79 2.38 .56 11.6 .5 4.5 2.7 .79 2 3.18 .79 2.38 .56 11.6 0.5 4.5 2.7 .79 3 1.8 .45 1.35 .56 6.7 .5 4.5 2.4 .57 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 SW8 090120.Scotts Farm Subdivision - Additional Information Request Subject: SW8 090120 Scotts Farm Subdivision - Additional Information Request From: Mary Jean Naugle <Mary.Naugle@ncmail.net> Date: Tue, 14 Apr 2009 10:45:51 -0400 To: habersaygr@aol.com, Mary Naugle <Mary.Naugle@ncmail.net> Sue The attached ad info request was mailed to the applicant and the PE on the plans. re: item 7 Please round your numbers up on the BUA table and recheck the values reported on the table with that reported on the application at the bottom of page 2 and elsewhere in the documentation for the application [plans, calcs, etc...]. Please let me know that you receive this memo. Thank you Mary Jean Mary Jean Naugle NC DENR Express Permitting 910-796-7303 910-350-2004 fax Please note: E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties. 090120 apr09.doc Content -Type: - application/msword Content -Encoding: base64 1 of 1 4/14/2009 10:46 AM P. 01 TRANSACTION REPORT APR-02-2009 THU 12:27 PM t - FOR: NCDENR 910 350 2004 SEND DATE START RECEIVER TX TIME PAGES TYPE NOTE Md DP APR-02 12:25 PM 912525222501 1119" 3 FAX TX OK 362 1 TOTAL 1M 19S PAGES: 3 t State of North Carolina Department of Environment and Natural Resources Wilmington Regional Office Beverly Eaves Perdue, Governor FAX COVER SHEET Dee Freeman, Secretary Date; "Y -� U / No. Pages (excl. cover): 2 Express Permitting To: zw From: Sandra Fxum Co: CV /� P� Phone: (910) 796-7265_ Fax: �a _ Sod -- szv V Fax: (910)350-2004 Re: i Yea Hard comv to follow 127 Cardinal Drivc Extension, Wilmington, NC: 29405 • (910) 796-7215 • An Equal Opportunity Affirmative Action Employer ©�� �� r NCDENR North Carolina Department of Environment and Division of Water Quality Beverly Eaves Perdue Coleen H. Sullins Governor Director April 2, 2009 S. F. Ballou, Jr., President S. F. Ballou, Inc. 301 Commerce Avenue, Suite 101 Morehead City, NC 28557 Subject: Request for Additional Information Stormwater Project No. SW8 090120 Scotts Farm Subdivision Carteret County Dear Mr. Ballou: Natural Resources Dee Freeman Secretary The Wilmington Regional Office received a State Stormwater Management Permit Application for Scotts Farm Subdivision on January 21, 2009. A preliminary review of that information has determined that the following information is needed to continue the stormwater review: 1. Please either delineate all wetlands on site, disturbed or undisturbed, or note on the plans that none exist. It appears there are no wetlands on site. If so, please add the note on the plans: "no wetlands are within the permit area". 2. Please locate all Stormwater systems, including swales, in access/drainage easements, to be recorded and label the typical location and width on the plan #SP-5. For example the rear lot easement is labeled but none for the drainage system along the road or between each lot line. A 10-foot setback appears to be provided along each lot line, but since there is Stormwater drainage routed along each lot line, the drainage easement and width needs to be labeled on the plans. 3. Please initial checklist on page 1 of the curb outlet supplement. 4. Since this is a low density project, there is no collection system allowed, please limit piping to the minimum required to cross under roads. Please eliminate the pipe between lots 5 & 6 that is reported on plans SP-5, SW-1, SE-1. Plan SE-2 shows the pipe stopping just after the road/sidewalk. 5. Provide dimensions and sizing calculations for the outlet protection on each stormwater outlet. A typical rip rap detail is provided on SE-5, but no dimensions or calculations are provided for sizing basis to demonstrate diffuse flow at non -erosive velocity. Please provide a table of dimensions for each outlet protection on the plans and label each with a corresponding number. Please label the location of the 5:1 trapezoidal swales. Plan DE-4 has a detail for a 3:1 v- bottom swale and there is no labeling on plan SP-5 to determine where the 5:1 trapezoidal swale is located. All plans need to report consistent information. The swales between lots need to be the 5:1 trapezoidal swale since they receive the curb outlet Stormwater runoff. The swale at the back of the lots needs to be the 5:1 trapezoidal swale since this is SA waters. Wilmington Regonal Office 127 Cardinal Drive Extension, Wilmington, North Carolina 28405 One Phone: 910-796-72151 FAX: 910-350-20041 Customer Service. 1-817-623-6748 North Carol jna Internet www rimalerquality org ry j�y�ry //� An Equal Opportunity l Affirrnafive Action Employer Naturally ral %f Please consider reporting the built -upon area for each lot in whole numbers. For example: Lot Number BUA (square feet) 1 2,062 2 through 15 2,121 16 2,214 17 2,411 18 2,402 This rounding to whole numbers of the BUA on each lot would revise the building BUA to 38,783 sf and the total to 85,934 sf. You may want to add the additional BUA of 3,048 sf to the BUA total on the table on the application, page 2, section III (9) as "future". This would take the project to 25% density limit and give some contingency. Just add the 3,048 sf of future BUA on the application table on the row labeled: 'other on -site (so". 8. Please remember that a change to one number, detail, or label may have a domino effect on other numbers. Please check all plans, calculations and application forms and make changes as needed. Please note that this request for additional information is in response to a preliminary review. The requested information should be received in this Office prior to May 5, 2009, or the application will be returned as incomplete. The return of a project will necessitate resubmittal of all required items, including the application fee. If you need additional time to submit the information, please mail, email or fax your request for a time extension to the Division at the address and fax number at the bottom of this letter. The request must indicate the date by which you expect to submit the required information. The Division is allowed 90 days from the receipt of a completed application to issue the permit. The construction of any impervious surfaces, other than a construction entrance under an approved Sedimentation Erosion Control Plan, is a violation of NCGS 143-215.1 and is subject to enforcement action pursuant to NCGS 143-215.6A. Please reference the State assigned project number on all correspondence. Any original documents that need to be revised have been sent to the engineer or agent. All original documents must be returned or new originals must be provided. Copies are not acceptable. If you have any questions concerning this matter please feel free to call me at (910) 796-7215 or email me at mary.Naugle(a)ncmail.net. �SYitncnerely, Mary ea N ugle GDS/mjn: S:\WQS\STORMWATER\adinfo\2009\090120 apr09 cc: William Gold, P.E., Meridian Engineering, P.A., 252-522-2587, fax: 2501 WiRO Page 2 of 2 Project name 6CotC rs CqQ fri ( n2i�t2.r'� l Review Date O Checklist for Completeness Review of Stormwater Applications G 4 L I . Each application for which a "Completeness Review" is needed will have this checklist printed on (pQZ yellow paper to distinguish it from other applications to be reviewed. GW��K ❑ Read the narrative and application to determine the type of project, i.e., residential vs.G'� commercial, subdivision vs. single lot, high density, low density, offsite, redevelopment, and n determine what documentation needs to be provided. ❑ Make sure that all required forms, supplements, O&M's, deed restrictions, signature authorizations, etc., are included and contain original signatures. ❑ If low density, make sure the BUA calculations include any common areas, clubhouse areas, etc., and do a quick math check for addition errors. ❑ Do a quick consistency check of the numbers used in the calculations vs. the numbers reported on the application. For multiple BMP's pick one or two to check. ❑ Ownership issues? Make sure the correct person has signed the application. If it's a corporation or LLC, print off the NCSOS information sheet and latest annual report. Make sure the person who signed is listed on the annual report with his/her correct title, or make sure a signature authorization letter has been provided. ❑ Make sure 2 sets of plans have been submitted, and that they include grading, layout (with dimensions for all proposed BUA) and details. 8 Are the Wetlands delineated on the plans? Y N By whom? If the project drains to SA waters, make sure a USGS topo map with the site, the receiving waters and the'/2 mile radius clearly shown to scale, is provided. ❑ For high density projects, make sure the correct design storm is used, based on the receiving stream classification and the projects proximity to SA waters. ❑ Make sure appropriate details are provided such as roads, cul-de-sacs, curbing, sidewalk, BMP's, level spreaders, vegetated filter strips, curb outlet swales, etc. Two of the most common errors are that sidewalk is indicated on the plans, but not included in the BUA talcs or shown with the road detail, and the road width used in the BUA calculations is less than that shown on the road detail. Are there any issues within the 575 ft ORW AEC? If high density, make sure the plans and calculations are signed, sealed and dated. If the project involves the subdivision of property or has outparcels, make sure a copy of the Proposed Declaration of Covenants and Restrictions in legal format with all required statements is provided, or that the appropriate standard deed restriction template, signed and notarized, is provided. ❑ Make sure that a Soils Report for all projects is provided, to determine if the required separation to the SHWT is provided. 8 For multiple HD systems & curb outlet swales, make sure a drainage area map is provided. If the application is substantially incomplete, give the entire file with the check to admin (Jo Casmer) to be returned to the applicant. Jo will keep copies of the return letters, application & check. ❑ If the application lacks only a few minor items such that it can be made complete within 24 hours, you can email the consultant and request the information. Hold onto the package for 24 hours. If the information isn't received within 24 hours, give the application to Jo to return. For Offsite projects: The Designer's Certification for the offsite system has been submitted. The deed restrictions have been recorded and a copy submitted. The offsite system is in compliance with its permit. Make sure the lot size hasn't changed from what was approved under the Master Plan and that the correct lot number is referenced on the supplement form. For Infiltration projects: Soils report to determine SHWT, soil type and expected infiltration rate is provided. Has Vincent conducted the site investigation? If Yes, date? For infiltration projects, the maximum 2 acre inches of volume in any single system has not been exceeded. For Wet Ponds projects: ❑ Permanent pool to be located no lower than 6" below the estimated SHWT. Otherwise, the incoming groundwater must be quantified and evaluated; the storage volume must be verified; and the outlet needs to be evaluated for free drainage to the receiving waters under SHWT conditions. S:1WQS\STORMWATER\FORMS\COMPLETENESS REVIEW Scott's Farm - Carteret, State Stormwater Application Subject: Scott's Farm - Carteret, State Stormwater Application t l a;)A 1 bq \ From: Mary Jean Naugle <Mary.Naugle@ncmail.nev �5 Ors02 Date: Tue, 20 Jan 2009 09:05:15 -0500 J To: wgold2@suddenlink.net, ssayger@suddenlink.net, Mary Naugle <Mary.Naugle@ncmail.net> Sue; We received the plan approved by the local jurisdiction for vested rights. The check was returned to Ballou Construction with the memo dated 12/18/08. Please resubmit a check for $505 payable to NC DENR. Please expedite to allow the application to be accepted. thank you Mary Jean Naugle NCDENR-DWQ, WiRO 910-796-7303 ,�O a-(q q 1Z Q07Y VX1 ,O L S slLfO u`."i_ Can't I of 1 1/20/2009 9:09 AM Meridian. Engjneering-c�cu... January 13, 2009 Ms. Mary Jean Naugle North Carolina Division of Water Quality Wilmington Regional Office 127 Cardinal Drive Extension Wilmington, NC 28405 Re: Scott's Farm Review Carteret County Mary Jean, 7JA CEIVE,1D,N 1 6 2009 We received your comments regarding Scott's Farm, Morehead City, Carteret County, North Carolina and have addressed each as follows: �OMMENT 1: Please report the signing official's title in S.F. Ballou, Inc. in Section 1.2 of the application. You must be the level of vice president in order to sign the permit application. It appears from the filing listed on the NC SOS that you are President. Please fill in the appropriate title on the application. RESPONSE I: Mr.Ballou signed the application as president. Line 1.2 has been revised to add the title ofpresident. t,OMMENT 2: Demonstrate vested rights for 1995 rule to allow the proposed density of 24 percent in SA waters. Although a letter from the county was submitted, it specifically stated that "no sketch was reviewed by Council". There was no layout submitted. A site -specific plan with local approval is required. A.) The project has obtained a legal building permit. (Please note that if the building permit was obtained prior to the issuance of a stormwater permit, then it was not legally obtained.) GS 153A-357 or GS 160A417 B.) The project has a site -specific development plan that has been approved by the local government prior to October 1, 2008. (You must submit a copy of the approval letter AND a copy of the approved plan with the application.) GS 153A-344.1(b)(5) & GS 160A-385.1(b)(5). (Under the referenced statutes, "site specific" is a plan that describes with reasonable certainty the type and intensity of a specific parcel or parcels of property. It can be in the form of a PUD, subdivision plat, preliminary plan, conditional or special use permit, a conditional or special use district zoning plan or any other land -use approval designation as may be utilized by a county. The plan has to show project boundaries, topography, location of buildings and other improvements, approximate dimensions, and the location of existing and proposed infrastructure such as water lines, sewer lines, and roads. —Sketch plans or documents which fail to describe with Meridian Engineering, 600-D Plaza Blvd, Kinston, NC 28503-252-522-2587 XY.Ag, f ,�: 388 McCOTTER BLVD, HAV ELOCK,NC 28532--252-444-5765 1 of 3 Mendian_Engineering reasonable certainty the type and intensity of use shall not be considered a site specific development plan.) C.) The project has provided a phased development plan showing a sufficient level of detail in the subsequent phases such that a phase of the project would require a material change of design in order to make it comply with the October 1 requirements. "A phased development plan approval pursuant to GS 153A-344.1 for a project located in the unincorporated part of a county that is subject to the Session law and where the Division will be issuing the permit. (A phased development plan describes development to a lesser degree of certainty than a site -specific plan, but in order for phased development plans to be exempted from the requirements of rule, the following information must be provided:) a. The phased development plan must show the initial or first phase of development, the type and intensity of use for the specific parcel or parcels, including the boundaries of the project and have an approved subdivision plan pursuant to GS 153A-330 through GS 153A-335. b. For any subsequent phase of development, sufficient detail must be provided such that implementation of the requirements of the rule for the phase of development would require a material change in that phase of the plan. D.) A vested development right. (For anything other than a building permit or an approved site -specific plan from the local government, you will have to go through the AG's office). A vested right to the development under GS 153A-344(b), 153A-344.1, 160A- 385(b) or 160A-385.1 issued by a local government that implements the rule. A vested right to the development under common law. ("Common law" is case law developed in North Carolina on vested rights and may require a legal opinion. Guidance on vested rights is developed with the assistance of our General Counsel and the AG's Office. If a decision cannot be made by staff based on the guidance, then the question may be referred to the AG's Office for a legal opinion.) RESPONSE 2: Vested rights are shown by the followings: 1. A site -specific sketch plan (included) approved by the local government (City of Morehead Planning Board) prior to October 11 2. , 2008 (see City letter 111412008), which includes project boundaries, topography, approximate dimensions, and the location of existing and proposed infrastructure such as water lines, sewer lines, and roads. The included sketch plan shows a sufficient level of detail, complying with the October 1 vested right requirements. Changes to this plan would require a material change of design. 3. Comment from DWQ response date October 18, 2008 stated, "...If you cannot redesign the project, I encourage you to pursue the vested development rights. " It is obvious from the site plan, that the project cannot be redesigned without significant and material changes. 4. The included letter from the City of Morehead demonstrates that the owner has demonstrated reasonable certainty the type and intensity of a specific parcel or parcels in the form of a preliminary plan. Meridian Engineering, 600-D Plaza Blvd, Kinston, NC 28503-252-522-2587 ,7C.`%.U. `Y, gnyirv�, 388 WCOTTER BLVD, IFIAVELOCK,NC 28532--252-444-5765 2 of 3 Meddian-Engineering_c ct „Gp There are always some difficulties when new regulations are implemented. From the original DWQ review comments, we have worked to ensure all the Division's comments and concerns have been addressed. We feel that the plan meets the requirements and that we have demonstrated our vested rights. With all our M S an ay E illi ' KSMJ Engineering PE- Meridian Engineering Meridian Engineering, 600-D Plaza Blvd, Kinston, NC 28503-252-522-2587 X.Y. ,7, Snyim&�, 388 McCOTTER BLVD, HAVELOCK,NC 28532--252 444-5765 3 of 3 -P-M 2 NJ Checklist for Completeness Review of Stormwater Applications Each application for which a "Completeness Review' is needed will have this checklist printed on mar] yellow paper to distinguish it from other applications to be reviewed. ot-ilm S t-Te seed 'c ❑ Read the narrative and application to determine the type of project, i.e., residential vs. commercial, subdivision vs. single lot, high density, low density, offsite, redevelopment, and PIA determine what documentation needs to be provided. F-o 2 ❑ Make sure that all required forms, supplements, O&M's, deed restrictions, signature vt--I-rep authorizations, etc., are included and contain original signatures. fl.C,� [{T� ❑ If low density, make sure the BUA calculations include any common areas, clubhouse areas, etc., and do a quick math check for addition errors. ❑ Do a quick consistency check of the numbers used in the calculations vs. the numbers reported on the application. For multiple BMP's pick one or two to check. ❑ Ownership issues? Make sure the correct person has signed the application. If it's a corporation or LLC, print off the NCSOS information sheet and latest annual report. Make sure the person who signed is listed on the annual report with his/her correct title, or make sure a signature authorization letter has been provided. ❑ Make sure 2 sets of plans have been submitted, and that they include grading, layout (with dimensions for ail proposed BUA) and details. e Are the Wetlands delineated on the plans? Y N By whom? If the project drains to SA waters, make sure a USGS topo map with the site, the receiving waters and the Y mile radius clearly shown to scale, is provided. ❑ For high density projects, make sure the correct design storm is used, based on the receiving stream classification and the projects proximity to SA waters. ❑ Make sure appropriate details are provided such as roads, cul-de-sacs, curbing, sidewalk, BMP's, level spreaders, vegetated filter strips, curb outlet swales, etc. Two of the most common errors are that sidewalk is indicated on the plans, but not included in the BUA calcs or shown with the road detail, and the road width used in the BUA calculations is less than that shown on the road detail. Are there any issues within the 575 ft ORW AEC? If high density, make sure the plans and calculations are signed, sealed and dated. If the project involves the subdivision of property or has outparcels, make sure a copy of the Proposed Declaration of Covenants and Restrictions in legal format with all required statements is provided, or that the appropriate standard deed restriction template, signed and notarized, is provided. ❑ Make sure that a Soils Report for all projects is provided, to determine if the required separation to the SHWT is provided. e For multiple HD systems & curb outlet swales, make sure a drainage area map is provided. If the application is substantially incomplete, give the entire file with the check to admin (Jo Casmer) to be returned to the applicant. Jo will keep copies of the return letters, application & check. ❑ If the application lacks only a few minor items such that it can be made complete within 24 hours, you can email the consultant and request the information. Hold onto the package for 24 hours. If the information isn't received within 24 hours, give the application to Jo to return. For Offsite projects: The Designer's Certification for the offsite system has been submitted. The deed restrictions have been recorded and a copy submitted. The offsite system is in compliance with its permit. Make sure the lot size hasn't changed from what was approved under the Master Plan and that the correct lot number is referenced on the supplement form. For Infiltration projects: Soils report to determine SHWT, soil type and expected infiltration rate is provided. Has Vincent conducted the site investigation? If Yes, date? For infiltration projects, the maximum 2 acre inches of volume in any single system has not been exceeded. For Wet Ponds projects: ❑ Permanent pool to be located no lower than 6" below the estimated SHWT. Otherwise, the incoming groundwater must be quantified and evaluated; the storage volume must be verified; and the outlet needs to be evaluated for free drainage to the receiving waters under SHWT conditions. S:\WQS\STORMWATER\FORMS\COMPLETENESS REVIEW � —i December 18, 2008 Sammie Ballou S.F. Ballou, Inc. 301 Commerce Avenue Morehead City, NC 28557 Subject: APPLICATION RETURN Project Name: Scotts Farm Subdivision Location/County: Carteret County Dear Mr./Ms. Ballou: Michael F. Easley, Governor William G Ross Jr, Secretary North Carolina Department ofEnvironment and Natural Resources Coleen 11 Sullins Director Division of Water Quality The Division received an incomplete stormwater application for the project listed above on November 24, 2008. The application and check number 40602, are being returned because the package lacked the necessary elements to accept it for review. The following information is needed to accept the application for review: I.) Please report the signing official's title in S.F. Ballou, Inc. in Section 1.2 of the application. You must be at least the level of vice president in order to sign the permit application. It appears from the filing listed on the NC SOS that you are President. Please fill in the appropriate title on the application. II.) Demonstrate vested rights for 1995 rule to allow the proposed density of 24 percent in SA waters Although a letter from the county was submitted, it specifically stated that "no sketch was reviewed by Council". There was no layout submitted. A site -specific plan with local approval is required. Please provide vested rights to include approval of one of the following: A.) The project has obtained a legal building permit. (Please note that if the building permit was obtained prior to the issuance of a stormwater permit, then it was not legally obtained.) GS153A-357 or GS 160A-417. B.) The project has a site -specific development plan that has been approved by the local government prior to October 1, 2008. (You must submit a copy of the approval letter AND a copy of the approved plan with the application.) GS 153A-344. 1 (b)(5) & GS 160A-385.1(b)(5). (Under the referenced statutes, "site specific" is a plan that describes with reasonable certainty the type and intensity of use for a specific parcel or parcels of property. It can be in the form of a PUD, subdivision plat, preliminary plan, conditional or special use permit, a conditional or special use district zoning plan or any other land -use approval designation as may be utilized by a county. The plan has to show project boundaries, topography, location of buildings and other improvements, approximate dimensions, and the location of existing and proposed infrastructure such as water lines, sewer lines, and roads. -Sketch plans or documents which fail to describe with reasonable certainty the type and intensity of use shall not be considered a site specific development plan.) C.) The project has provided a phased development plan showing a sufficient level of detail in the subsequent phases such that a phase of the project would require a material change of design in order to make it comply with the October 1 requirements. "A phased development plan approval pursuant to GS 153A-344.1 for a project located in the unincorporated part of a county that is subject to the Session law and where the Division will be issuing the permit. (A phased development plan describes development to a lesser degree of certainty than a site -specific plan, but in order for phased development plans to be exempted from the requirements of rule, the following information must be provided.) 1.) The phased development plan must show the initial or first phase of development, the type a d intensity of use for the specific parcel or parcels, including the boundaries of the project and ha hCuohna nn apPrnvori cnhrlivicinn In an nurcuant to (,R 1 ciIA-'iqn thrnneh r'q 1 _i4A-.TTC; Wurall# i North Carolina Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Phone (910) 796-7215 Customer Service Wilmington Regional Office Internet www ncwaterauahty or Fax (910) 350-2004 1-877-623-6748 An Equal Opportunity/Affirmative Action Employer - 50% Regded110% Post Consumer Paper 2.) For any subsequent phase of development, sufficient detail must be provided such that implementation of the requirements of the rule for that phase of development would require a material change in that phase of the plan. D.) A vested development right. (For anything other than a building permit or an approved site - specific plan from the local government, you will have to go through the AG's office). A vested right to the development under GS 153A-344(b), 153A-344.1, 160A-385(b) or 160A-385.1 issued by a local government that implements the rule. A vested right to the development under common law. ("common law" is case law developed in North Carolina on vested rights and may require a legal opinion. Guidance on vested rights is developed with the assistance of our General Counsel and the AG's Office. If a decision cannot be made by staff based on the guidance, then the question may be referred to the AG's Office for a legal opinion.) Please note that projects received after October 1, 2008, must adhere to the new coastal stormwater rules. Since this project did not demonstrate vested rights, it is being returned and you will need to either redesign the project to adhere to these new rules, or include a copy of a vested right (as listed in the Session Law and described above) issued prior to October 1, 2008 along with your corrected and resubmitted application. Please provide the requested information and return the package to the address below. Note that the 90-day statutory permit review time begins upon receipt of a complete application. If you have any questions, please do not hesitate to call me at (910) 796-7303 or email me at mare. NaUoleancmail. net. Sincerely, 4)p'-Le Mary Je Naugle GDS/mjn: S:\WQS\STORMWATER\RETURN\scottsfarm dec08 cc: William Gold, P.E., Meridian Engineering (-Wilmington _Regional Files- - ;; M.J. Naugle Meridian Engineerin2, PA/7CS9K7 Engineerind. 4llc November 21, 2008 Ms. Linda Lewis,. - Mr. Paul Worthington Division of Water Quality Division of Land Quality Wilmington Regional Office 127 Cardinal Drive Extension Wilmington, NC 28405 Re: Scotts Farm Subdivision Review Carteret County Dear Ms. Lewis/Mr. Worthington, NOV g d 2008 BY:_,�_1 Attached are the revised erosion and sediment control plans and stormwater application and plans for the Scotts Farm Subdivision project located in Morehead City, Carteret County, North Carolina. As we explained in our earlier response to the Departments review, we have revised the plan as you requested. Additionally, we are re -submitting the package under the old regulations with our vested development rights established by preliminary plan approval in No 20, 2007. A letter (page 8) from the City of Morehead Planning Department is included for verification. As always, thank you in advance for you time and consideration. Sincerely, Susan L. Sayger, PE, KSMJ Engineering, KSMJ Engineering, Pllc William/Gold, PE, Meridian Enginee 'ng, P.A CC: Mr. Sammie Ballou-301 Commerce Avenue, Morehead City STORMWATER CALCULATIONS 8 SEDIMENTATION 8. EROSION CONTROL DATA For SCOTTS FARM SUBDIVISION S. F. Ballou, Inc. 301 Commerce Avenue Morehead City, N. C. 28557 September 26, 2008-Rvsd Novermber 21, 2008 . NGINE. GOFPORgTF 2 S]Egg, a _ Prepared by .•• o allies 9111(&MAQ�f� KSMJ, PLLC 5P 1 PA r 129l CxCAI,W 28508 6100-9) a/'/.d �8aukvad pn%i"4., Q/rawe W"'4 is 28501 C��ane �-252-522-2587 r �\Vdva tt• ypp�jtF, e i. pp, SCOTTS FARM SUBDIVISION TABLE OF CONTENTS Page # • Cover • Table of Contents 2 • Maps 3 • Major Design Elements 6 • Stormwater Management Permit Application 9 • Low Density Deed Restrictions 13 • Curb Outlet System Supplement 14 • Low Density Supplement 18 • Financial Responsibility/Ownership Form 21 • Construction Sequence 23 • Calculations/ Data 24 • Deed Copy 50 • Soils Report 51 2 c 800Z/ZI/[ l"'oa•st83aauuoa-aaialiea//:dl;q=dtINZxdse'raopuimIuud/deIN/tuoa-si8laauuoa•zaiaUua//:duq law 588:T T 3o i a$ed SI'JlaauuoD A R � . u — N34°45'21" * h'4 i..�t � • v t ( 9 0 ♦ 3 M1 44 N34945'15"_.__ r 76043,33"W 764043'27" W 76043'21" W 76043'15"1 VJ 7643 9" +V 76 43ii3" �N 76 42'S7" W 76 42'S1" W 76 42'45" $4w z �.� N3"4°45'3" i Goun'tiY�ClubiR`ry r`', ti I P, N n } p e : N34044-57"— __ a* I Name of Stream Description Corr. Class Date Basin Stream Index # Broad Creek From source to Bogue Sound West Prong Broad From source to Broad Creek Creek Hannah Branch From source to West Prong Broad Creek Sandy Branch From source to Hannah Branch Wolf Branch From source to West Prong Broad Creek East Prong Broad From source to Broad Creek Creek Gales Creek From source to Bogue Sound East Prong Gales From source to Gales Creek Creek Jumping Run From source to Bogue Sound Roosevelt All of the fresh Natural Area waters within the Swamp property'boundaries of the natural area including swamp forest, shrub swamp and ponds SA; HOW SA; HOW SA; HQW SA; HQW SA; HQW SA; HQW SA; HQW SA; HQW SA; HQW C; Sw, ORW Roosevelt All of the saline SA;SW,ORW Natural Area waters within the Swamp boundaries of the natural area including brackish marsh and salt marsh NEWPORT RIVER From source to Little C Creek Swamp NEWPORT RIVER From Little Creek SA;HQW Swamp to Atlantic Ocean with exception of Morehead City Harbor restricted area Smiths Swamp From source to Newport C Branch River Deep Creek From source to Newport C River Laurel Branch From source to Deep C Creek Little Deep Creek From source to Deep C Creek Snows Swamp From source to Newport C Branch River Sandy Branch From source to Newport C River Lodge Creek From source to Newport C River Page 3 of 16 06/01/56 White oak 20-36-7 06/01/56 White Oak 20-36-7-1 06/01/56 White Oak 20-36-7-1-1 06/01/56 White Oak 20-36-7-1-1-1 06/01/56 White Oak 20-36-7-1-2 06/01/56 White Oak 20-36-7-2 06/01/56 White Oak 20-36-8 06/01/56 White Oak 20-36-8-1 06/01/56 White Oak 20-36-9 06/01/88 White Oak 20-36-9.5-(1) 06/01/88 White Oak 20-36-9.5-(2) 06/01/56 White Oak 21-(1) 06/01/56 White Oak 21-(17) 06/01/56 White Oak 21-10 09/01/74 White Oak 21-11 09/01/74 White Oak 21-11-1 09/01/74 White Oak 21-11-2 06/01/56 White Oak 21-12 06/01/56 White Oak 21-13 06/01/56 White Oak 21-14 2008-10-25 06:18:21 3 Scott's Farm Subdivision Low Density -Curb Outlet -Grassed swale Morehead City, Carteret County North Carolina This narrative discusses the low density stormwater permit application for the Scott's Farm Subdivision project, which was approved by the City of Morehead Planning Board on November 20, 2007 (see attached letter). The plan includes construction of a 18-lot single family residential subdivision on a 8.18-arce parcel located off Ashley Drive, near Country Club Road, Morehead City, Carteret County, North Carolina. The attached plan and calculations are for details of curb outlet and trapezoidal shaped, grassed swale system which outfalls into an existing Swale along the southern boundary. The existing topography of the parcel is relatively flat and drains at a minimum grade of 1% to the center of the site and into an existing ditch. The site drains less than one half mile to the Newport River, classified as a SA/HQW. In general, the design maintains the existing drainage pattern. The site proposes 83,838 sqft of impervious surfaces out of 8.18 acres, or 23.5%, less than 24% impervious surfaces. As such, stormwater is being managed and permitted under the curb outlet, low density option. The site is designed so that all stormwater from the proposed road (Ashley Drive) drains towards and through the curb cut outlets at each lot. From the curb cuts, runoff drains into swales and into the trapezoidal grassed swales. The trapezoidal swales have a longitudinal slope of 0.5%, a two - foot bottom width and 5:1 side slopes. As seen in the attached routings the 10 year event depth is 0.8 foot resulting in over one-half foot freeboard at 2.9 feet per second, maximum velocity. MAJOR DESIGN ELEMENTS Swale Parameters The channel was design in accordance with NC DENR DQW major design elements. The proposed channels is in two segments which are approximately 1,600 total feet (greater than 150 feet), draining towards the existing center at a 0.5% slope. With a two -foot bottom and 5:1 side slopes the 10 year depth is 0.8-foot. The channel is 1.3 deep and will provide 0.5 feet of freeboard. The channel is designed such that the ten year storm is 2.9 fps. At the downstream end where the proposed swales GfZ()306C&plc 388 McCotter Blvd., Havelock, NC 28.532 PL/4NNIN4+y„p,F,SfG, MQLug.g.RI ka M Scott's Farm Subdivision Low Density -Curb Outlet -Grassed swale Morehead City, Carteret County North Carolina discharge into the existing channel, the 10 year velocity is also non -erosive at 3.01 fps (See attached calculations). The BMP is located within a drainage easement to be recorded. • The 10-year pre -development run-off= 23 cfs • The 10-year post development runoff 29 cfs • The 10-year post -development maximum velocity = 3.0 fps • Provided channel length = over 1,600 ft, greater than 150 feet • Provided channel slope = 0.5% • Provided channel side slopes = 5:1 • Provided freeboard = 0.5 feet • Recorded easement and maintenance agreement CONCLUSION Supporting Documentation (Pre-Dev Route) (Route) (Route) (Plan set) (Plan set) (Plan set) (Plan set/channel calc) (Plan set) The proposed design is for 8.18 total acre site for a 18 lot single family residential subdivision. All impervious surfaces will drain to curb cuts and overland to the BMP grassed, trapezoidal swales. The proposed BMP contains the required event, design parameters, freeboard, meeting or exceeding all DENR size, depth and volume requirements. un„imp o3uran Cy+od" 05"M, Susan H. Sayger,PE KSMJ,pllc/Meridian Engineering PA 388 McCotter Blvd, Havelock, NC 28532 252-349-5803,252-444-5765 CAROB SE LT 324 1 GKo50 CY* 388 McCotter Blvd., Havelock, NC 28.532 PJ=�iNNINGy, D ESIG, N�._ENGIfJ ,E�ERI N,G, T GEORGE W BALLOU, Mayor Pro-Tem Council PAULW CORDOVA DAVID HORTON JOHN F. NELSON DEMUS L. THOMPSON Meridian Engineering Attn: Al Gould P.O. Box 1291 Kinston, NC 28503 Dear Mr. Gould: MOREH AD CITY GERALDA JONES, JR., Mayor Epo c�r� NORTH CAF20L1 NA o(;,�;—�,� 706 Arendell Street �1F�� p Morehead City, North Carolina 28557-4234 ,pg TEL (252) 726-6848 FAX (252) 726-2267 R. RANDY MARTIN w .moreheadcrty nc gov City Manager November 4, 2008 RE: Scotts Farm — Proposed 18 Lot Subdivision 1545 Country Club Road Per your request, the following timeline is provided regarding the above -referenced property: 7/10/2007: City Council called public hearing for annexation request. 8/14/2007: City Council annexed property effective 8/31/2007. 10/16/2007: Planning Board recommended denial of request to rezone property from R20 to R15. 11/7/2007: City Council approved request to rezone property from R20 to R15. 11/20/2007: Planning Board recommended approval of the Sketch Plan. Please note the Sketch Plan was not reviewed by Council at the request of the developer. If you should have any further questions or required additional information, please don't hesitate to contact me at (252) 726-6848 ext. 140. Sincerely, Sandi Watkins Planner ADA/EOE/P Equal Opportunity Employer Provider 8 FINANCIAL RESPONSIBILITY /OWNERSHIP FORM SEDIMENTATION POLLUTION CONTROL ACT No person may initiate a land -disturbing activity on one or more acres as covered by the Act before this form and an acceptable erosion and sedimentation control plan have been completed and approved by the Land Quality Section, NC Department of Environment, and Natural Resources. (Please type or print and, if question is not applicable, place N/ A in the blank). L?VV RAS 013I41NAh— Part A. .� TRR1L1n141� 1. Project Name Scotts Farm Subdivision c V 04 %'116 S M w 2. Location of land -disturbing activity: County Carteret i t •T ��ra T* . ACTV City or Township Morehead City and Highway/Street Highway 70 West Latitude N344542 Longitude W76-44-06 3. Approximate date land -disturbing activity will be commenced: 3-1-09 4. Purpose of development (residential, commercial, industrial, etc.): Residential Total acreage disturbed or uncovered (including off -site borrow and waste areas): 8.18 5. Amount of fee enclosed S 585.00 6. Has an erosion and sedimentation control plan been filed? Yes No Enclosed X 7. Person to contact should sediment control issues arise during land -disturbing activity. Name Sammie Ballou Telephone 252-241-7966 Fax 252-726-5814 g Landowner(s) of Record (Use blank page to list additional owners): Sammie Ballou Name(s) 301 Commerce Avenue Current Mailing Address Current Street Address Morehead City, N. C. 28557 City State Zip City State Zip 9. Recorded in Deed Book No. 1005 Page No. 30 Part B. Person(s) or firm(s) who are financially responsible for this land -disturbing activity (Use a blank page to list additional persons or firms): Sammie Ballou Name of Person(s) or Firm(s) 301 Commerce Avenue Current Mailing Address Morehead City, N. C. 28557 City State Zip Telephone 252-241-7966 s Current Street Address city State Zip Telephone �I. i fr" a A--E �f •t L• .a r � er• Td I` . � a� 2 (a) If the Financially Responsible Party is not a resident of North Carolina give name and street address of a North Carolina Agent. Name Mailing Address City State ZIP Telephone Street Address City State Zip Telephone (b) If the Financially Responsible Party is a Partnership or other person engaging in business under an assumed name, attach a copy of the certificate of assumed name. If the Financially Responsible Party is a Corporation give name and street address of the Registered Agent. Name of Registered Agent Mailing Address City State Zip Telephone Street Address Telephone State Zip The above information is true and correct to the best of my knowledge and belief and was provided by me under oath. (This form must be signed by the financially responsible person if an individual or his attomey- in-fact or if not an individual by an officer, director, partner, or registered agent with authority to execute instruments for the financially responsible person). 1 agree to provide corrected information should there be any change in the information provided herein. Sammie Ballou Type or print name Signature Title or Authority Date a Notary Public of the County of State of North Carolina, hereby certify that appeared personally before me this day and being duly sworn acknowledged that the above form was executed by him. Witness my hand and notarial seal, this day of , 200_ Seal Notary My commission expires SCOWS FARM SUBDIVISION CONSTRUCTION SEQUENCE 1. In strict accordance with the approved plan, clear and grade only enough to install construction entrance and temporary silt fence on the north,east and west sides of the property along the property lines except across the eastern driveway into the property. 2. Rough grade site and swales. Shape and install rock check dams. g. Install utilities, including catch basins. Install inlet protection at the middle of the property. 4. Seed all disturbed areas and stabilize slopes with meshtype fabric if needed within 21 days. 5. Haul in approved fill material, spread and compact over building pads with slight slope away from the building in three directions per side or rear swales. 6. Cut new road - Ashley Drive — and shape for proper. drainage. 7. Pave road, install curbing, curb cuts, sidewalks and seed pervious areas. -8. Clean out sediment in swales to design elevations. 9. Do not remove temporary silt fence until construction is complete. S. F. Ballou, Inc. 9-5-o8 10 0 reDD1 PreDD1 Sulicat Reach Pon Link Z�' C: \ algold3 \ algold3ROUTEpre scott farm 10 year pre dev Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 2 HydroCADO 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Area Listing (all nodes) Area (sa-ft) C Description (ssubcats) 355,930 0.40 50-75% Grass cover, Fair, HSG B (preDD1) 355,930 Z< C: \ algold3 \ algold3ROUTEpre scott farm 10 year pre dev Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 3 HydroCAD® 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Subcatchment preDD1: PreDD1 Runoff = 23.07 cfs @ 0.17 hrs, Volume= 83,050 cf, Depth= 2.80" Runoff by Rational method, Rise/Fall=1.0/1.0 xTc, Time Span= 0.00-3.00 hrs, dt= 0.01 hrs Rainfall Duration=60 min, Inten=7.00 in/hr Area (so C Description 355,930 0.40 50-75% Grass cover, Fair, HSG B 355,930 0.40 Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, Z6 C: \ algold3 \ scott farm 10 year pre dev algold3ROUTEpre Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 4 HydroCADO 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Hydrograph for Subcatchment preDD1: PreDD1 Time Runoff (hours) (cfs) 0.00 0.00 0.05 6.92 0.10 13.84 0.15 20.76 0.20 23.07 0.25 23.07 0.30 23.07 0.35 23.07 0.40 23.07 0.45 23.07 0.50 23.07 0.55 23.07 0.60 23.07 0.65 23.07 0.70 23.07 0.75 23.07 0.80 23.07 0.85 23.07 0.90 23.07 0.95 23.07 1.00 23.07 1.05 16.15 1.10 9.23 1.15 2.31 1.20 0.00 1.25 0.00 1.30 0.00 1.35 0.00 1.40 0.00 1.45 0.00 Time Runoff (hours) (cfs) 1.50 0.00 1.55 0.00 1.60 0.00 1.65 0.00 1.70 0.00 1.75 0.00 1.80 0.00 1.85 0.00 1.90 0.00 1.95 0.00 2.00 0.00 2.05 0.00 2.10 0.00 2.15 0.00 2.20 0.00 2.25 0.00 2.30 0.00 2.35 0.00 2.40 0.00 2.45 0.00 2.50 0.00 2.55 0.00 2.60 0.00 2.65 0.00 2.70 0.00 2.75 0.00 2.80 0.00 2.85 0.00 2.90 0.00 2.95 0.00 Time Runoff (hours) (cfs) 3.00 0.00 Z7 PostDD1 (new Reach) Subcat Reach on Llnk lb C: \ algold3 \ algold3ROUTEfinal scotts farm 10year post dev Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 2 HydroCADO 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Area Listing (all nodes) Area (sq-ft) C Description (subcats) 126,455 0.40 50-75% Grass cover, Fair, HSG B (PostDD1) 55,141 0.90 Paved parking & roofs (PostDDl) 181,596 71) C: \ algold3 \ algold3ROUTEfinal scotts farm 10year post dev Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 3 HydroCAD® 8.00 s/n 004746 @ 2006 HydroCAD Software Solutions LLC Subcatchment PostDD1: PostDD1 Runoff = 16.18 cfs @ 0.17 hrs, Volume= 58,262 cf, Depth= 3.85" Runoff by Rational method, Rise/Fall=1.0/1.0 xTc, Time Span= 0.00-3.00 hrs, dt= 0.01 hrs Rainfall Duration=60 min, Inten=7.00 in/hr Area (so C Description 55,141 0.90 Paved parking & roofs 126,455 0.40 50-75% Grass cover, Fair, HSG B 181,596 0.55 Weighted Average 181,596 0.55 Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 ' Direct Entry, 2 C:\algold3\ scoffs farm 10year post dev algold3ROUTEfinal Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 4 HydroCAD® 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Hydrograph for Subcatchment PostDD1: PostDD1 Time Runoff (hours) (cfs) 0.00 0.00 0.05 4.86 0.10 9.71 0.15 14.57 0.20 16.18 0.25 16.18 0.30 16.18 0.35 16.18 0.40 16.18 0.45 16.18 0.50 16.18 0.55 16.18 0.60 16.18 0.65 16.18 0.70 16.18 0.75 16.18 0.80 16.18 0.85 16.18 0.90 16.18 0.95 16.18 1.00 16.18 1.05 11.33 1.10 6.47 1.15 1.62 1.20 0.00 1.25 0.00 1.30 0.00 1.35 0.00 1.40 0.00 1.45 0.00 Time Runoff (hours) (cfs) 1.50 0.00 1.55 0.00 1.60 0.00 1.65 0.00 1.70 0.00 1.75 0.00 1.80 0.00 1.85 0.00 1.90 0.00 1.95 0.00 2.00 0.00 2.05 0.00 2.10 0.00 2.15 0.00 2.20 0.00 2.25 0.00 2.30 0.00 2.35 0.00 2.40 0.00 2.45 0.00 2.50 0.00 2.55 0.00 2.60 0.00 2.65 0.00 2.70 0.00 2.75 0.00 2.80 0.00 2.85 0.00 2.90 0.00 2.95 0.00 Time Runoff (hours) (cfs) 3.00 0.00 30 C: \ algold3 \ scotts farm 10year post dev algold3ROUTEfinal Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 5 HydroCADO 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Reach 1R: (new Reach) Inflow Area = 181,596 sf, Inflow Depth = 3.85" Inflow = 16.18 cfs @ 0.17 hrs, Volume= 58,262 cf Outflow = 16.18 cfs @ 1.06 hrs, Volume= 58,257 cf, Atten= 0%, Lag= 53.4 mir Routing by Stor-Ind+Trans method, Time Span-- 0.00-3.00 hrs, dt= 0.01 hrs Max. Velocity= 3.01 fps, Min. Travel Time= 3.7 min Avg. Velocity = 1.43 fps, Avg. Travel Time= 7.7 min Peak Storage= 3,546 cf @ 1.00 hrs, Average Depth at Peak Storage= 0.86' Bank -Full Depth= 2.00', Capacity at Bank-Full=120.04 cfs 2.00' x 2.00' deep channel, n= 0.022 Earth, clean & straight Side Slope Z-value= 5.0 '/' Top Width= 22.00' Length= 660.0' Slope= 0.0050 '/' Inlet Invert-- 6.00', Outlet Invert-- 2.70' u� Sz C:\algold3\ algold3ROUTEfinal scotts farm 10year post dev Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 6 HydroCADO 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Hydrograph for Reach 1R: (new Reach) Time Inflow Storage Elevation Outflow (hours) (cfs) (cubic -feet) (feet) (cfs) 0.00 0.00 0 6.00 0.00 0.20 16.18 3,096 6.79 7.93 0.40 16.18 3,540 6.85 16.05 0.60 16.18 3,546 6.86 16.18 0.80 16.18 3,546 6.86 16.18 1.00 16.18 3,546 6.86 16.18 1.20 0.00 1,023 6.39 7.32 1.40 0.00 219 6.13 0.59 1.60 0.00 89 6.06 0.13 1.80 0.00 48 6.03 0.04 2.00 0.00 30 6.02 0.02 2.20 0.00 21 6.01 0.01 2.40 0.00 14 6.01 0.01 2.60 0.00 10 6.01 0.01 2.80 0.00 7 6.00 0.00 3.00 0.00 5 6.00 0.00 3'J C: \ algold3 \ scotts farm 10year post dev algold3ROUTEfinal Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 7 HydroCADO 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Stage -Discharge for Reach 1R: (new Reach) Elevation Velocity Discharge (feet) (ft/sec) (cfs) 6.00 0.00 0.00 6.05 0.60 0.07 6.10 0.91 0.23 6.15 1.14 0.47 6.20 1.34 0.80 6.25 1.51 1.23 6.30 1.67 1.76 6.35 1.82 2.39 6.40 1.96 3.14 6.45 2.09 4.01 6.50 2.22 5.00 6.55 2.34 6.12 6.60 2.46 7.38 6.65 2.57 8.78 6.70 2.68 10.33 6.75 2.79 12.04 6.80 2.90 13.91 6.85 3.00 15.94 6.90 3.10 18.15 6.95 3.20 20.53 7.00 3.30 23.09 7.05 3.39 25.84 7.10 3.49 28.78 7.15 3.58 31.92 7.20 3.67 35.26 7.25 3.76 38.81 7.30 3.85 42.56 7.35 3.94 46.54 7.40 4.03 50.74 7.45 4.11 55.16 Elevation Velocity Discharge (feet) (ft/sec) (cfs) 7.50 4.20 59.81 7.55 4.28 64.71 7.60 4.36 69.83 7.65 4.45 75.21 7.70 4.53 80.83 7.75 4.61 86.71 7.80 4.69 92.84 7.85 4.77 99.24 7.90 4.85 105.90 7.95 4.92 112.83 8.00 5.00 120.04 5V C: \ algold3 \ scotts farm 10year post dev algold3ROUTEfinal Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 8 HydroCADO 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Stage -Area -Storage for Reach 1R: (new Reach) Elevation End -Area Storage (feet) (sq-ft) (cubic -feet) 6.00 0.0 0 6.05 0.1 75 6.10 0.3 165 6.15 0.4 273 6.20 0.6 396 6.25 0.8 537 6.30 1.1 693 6.35 1.3 867 6.40 1.6 1,056 6.45 1.9 1,263 6.50 2.3 1,485 6.55 2.6 1,725 6.60 3.0 1,980 6.65 3.4 2,253 6.70 3.9 2,541 6.75 4.3 2,847 6.80 4.8 3,168 6.85 5.3 3,507 6.90 5.9 3,861 6.95 6.4 4,233 7.00 7.0 4,620 7.05 7.6 5,025 7.10 8.3 5,445 7.15 8.9 5,883 7.20 9.6 6,336 7.25 10.3 6,807 7.30 11.1 7,293 7.35 11.8 7,797 7.40 12.6 8,316 7.45 13.4 8,853 Elevation End -Area Storage (feet) (sq-ft) (cubic -feet) 7.50 14.3 9,405 7.55 15.1 9,975 7.60 16.0 10,560 7.65 16.9 11,163 7.70 17.8 11,781 7.75 18.8 12,417 7.80 19.8 13,068 7.85 20.8 13,737 7.90 21.9 14,421 7.95 22.9 15,123 8.00 24.0 15,840 34**"' PostDD1 m (new Reach) Subcat Reach Aon Link 36 C: \ algold3 \ algold3ROUTEfinalb scotts farm-10yr post west Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 2 HydroCAD® 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Area Listing (all nodes) Area (sa-ft) C Description (subcats) 145,635 0.40 50-75% Grass cover, Fair, HSG B (PostDDl) 28,699 0.90 Paved parking & roofs (PostDDl) 174,334 71 C: \ algold3 \ scotts farm-10yr post west algold3ROUTEfinalb Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 3 HydroCAD® 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Subcatchment PostDD1: PostDD1 Runoff = 13.56 cfs @ 0.17 hrs, Volume= 48,814 cf, Depth= 3.36" Runoff by Rational method, Rise/Fall=1.0/1.0 xTc, Time Span= 0.00-3.00 hrs, dt= 0.01 hrs Rainfall Duration=60 min, Inten=7.00 in/hr Area (so C Description 28,699 0.90 Paved parking & roofs 145,635 0.40 50-75% Grass cover, Fair, HSG B 174,334 0.48 Weighted Average 174,334 0.48 Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, 3% C: \ a1go1d3 \ scotts farm-10yr post west algold3ROUTEfinalb Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 4 HydroCAD® 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Hydrograph for Subcatchment PostDD1: PostDD1 Time Runoff (hours) (cfs) 0.00 0.00 0.05 4.07 0.10 8.14 0.15 12.20 0.20 13.56 0.25 13.56 0.30 13.56 0.35 13.56 0.40 13.56 0.45 13.56 0.50 13.56 0.55 13.56 0.60 13.56 0.65 13.56 0.70 13.56 0.75 13.56 0.80 13.56 0.85 13.56 0.90 13.56 0.95 13.56 1.00 13.56 1.05 9.49 1.10 5.42 1.15 1.36 1.20 0.00 1.25 0.00 1.30 0.00 1.35 0.00 1.40 0.00 1.45 0.00 Time Runoff (hours) (cfs) 1.50 0.00 1.55 0.00 1.60 0.00 1.65 0.00 1.70 0.00 1.75 0.00 1.80 0.00 1.85 0.00 1.90 0.00 1.95 0.00 2.00 0.00 2.05 0.00 2.10 0.00 2.15 0.00 2.20 0.00 2.25 0.00 2.30 0.00 2.35 0.00 2.40 0.00 2.45 0.00 2.50 0.00 2.55 0.00 2.60 0.00 2.65 0.00 2.70 0.00 2.75 0.00 2.80 0.00 2.85 0.00 2.90 0.00 2.95 0.00 Time Runoff (hours) (cfs) 3.00 0.00 31 C:\algold3\ scotts farm-10yr post west algold3ROUTEfinalb Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 5 HydroCADO 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Reach 1R:(new Reach) Inflow Area = 174,334 sf, Inflow Depth = 3.36" Inflow = 13.56 cfs @ 0.17 hrs, Volume= 48,814 cf Outflow = 13.56 cfs @ 1.06 hrs, Volume= 48,808 cf, Atten= 0%, Lag= 53.4 mir Routing by Stor-Ind+Trans method, Time Span= 0.00-3.00 hrs, dt= 0.01 hrs Max. Velocity= 2.88 fps, Min. Travel Time= 3.8 min Avg. Velocity =1.38 fps, Avg. Travel Time= 8.0 min Peak Storage= 3,109 cf @ 1.00 hrs, Average Depth at Peak Storage= 0.79' Bank -Full Depth= 2.00', Capacity at Bank-Full=120.04 cfs 2.00' x 2.00' deep channel, n= 0.022 Earth, clean & straight Side Slope Z-value= 5.0 '/' Top Width= 22.00' Length= 660.0' Slope= 0.0050 '/' Inlet Invert- 6.00', Outlet Invert-- 2.70' q0 C: \ a1gold3 \ scotts farm-10yr post west algold3ROUTEfinalb Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 6 HydroCAD® 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Hydrograph for Reach 1R: (new Reach) Time Inflow Storage Elevation Outflow (hours) (cfs) (cubic -feet) (feet) (cfs) 0.00 0.00 0 6.00 0.00 0.20 13.56 2,681 6.72 6.21 0.40 13.56 3,102 6.79 13.42 0.60 13.56 3,108 6.79 13.56 0.80 13.56 3,109 6.79 13.56 1.00 13.56 3,109 6.79 13.56 1.20 0.00 932 6.37 6.45 1.40 0.00 208 6.12 0.56 1.60 0.00 86 6.06 0.12 1.80 0.00 47 6.03 0.04 2.00 0.00 29 6.02 0.02 2.20 0.00 20 6.01 0.01 2.40 0.00 14 6.01 0.01 2.60 0.00 10 6.01 0.01 2.80 0.00 7 6.00 0.00 3.00 0.00 5 6.00 0.00 q( C: \ algold3 \ scotts farm-10yr post west algold3ROUTEfinalb Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 7 HydroCADO 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Stage -Discharge for Reach 1R: (new Reach) Elevation Velocity Discharge (feet) (ft/sec) (cfs) 6.00 0.00 0.00 6.05 0.60 0.07 6.10 0.91 0.23 6.15 1.14 0.47 6.20 1.34 0.80 6.25 1.51 1.23 6.30 1.67 1.76 6.35 1.82 2.39 6.40 1.96 3.14 6.45 2.09 4.01 6.50 2.22 5.00 6.55 2.34 6.12 6.60 2.46 7.38 6.65 2.57 8.78 6.70 2.68 10.33 6.75 2.79 12.04 6.80 2.90 13.91 6.85 3.00 15.94 6.90 3.10 18.15 6.95 3.20 20.53 7.00 3.30 23.09 7.05 3.39 25.84 7.10 3.49 28.78 7.15 3.58 31.92 7.20 3.67 35.26 7.25 3.76 38.81 7.30 3.85 42.56 7.35 3.94 46.54 7.40 4.03 50.74 7.45 4.11 55.16 Elevation Velocity Discharge (feet) (ft/sec) (cfs) 7.50 4.20 59.81 7.55 4.28 64.71 7.60 4.36 69.83 7.65 4.45 75.21 7.70 4.53 80.83 7.75 4.61 86.71 7.80 4.69 92.84 7.85 4.77 99.24 7.90 4.85 105.90 7.95 4.92 112.83 8.00 5.00 120.04 q Z C: \ algold3 \ scotts farm-10yr post west algold3ROUTEfinalb Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 8 HydroCAD® 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Stage -Area -Storage for Reach 1R: (new Reach) Elevation End -Area Storage (feet) (sq-ft) (cubic -feet) 6.00 0.0 0 6.05 0.1 75 6.10 0.3 165 6.15 0.4 273 6.20 0.6 396 6.25 0.8 537 6.30 1.1 693 6.35 1.3 867 6.40 1.6 1,056 6.45 1.9 1,263 6.50 2.3 1,485 6.55 2.6 1,725 6.60 3.0 1,980 6.65 3.4 2,253 6.70 3.9 2,541 6.75 4.3 2,847 6.80 4.8 3,168 6.85 5.3 3,507 6.90 5.9 3,861 6.95 6.4 4,233 7.00 7.0 4,620 7.05 7.6 5,025 7.10 8.3 5,445 7.15 8.9 5,883 7.20 9.6 6,336 7.25 10.3 6,807 7.30 11.1 7,293 7.35 11.8 7,797 7.40 12.6 8,316 7.45 13.4 8,853 Elevation End -Area Storage (feet) (sq-ft) (cubic -feet) 7.50 14.3 9,405 7.55 15.1 9,975 7.60 16.0 10,560 7.65 16.9 11,163 7.70 17.8 11,781 7.75 18.8 12,417 7.80 19.8 13,068 7.85 20.8 13,737 7.90 21.9 14,421 7.95 22.9 15,123 8.00 24.0 15,840 Y) PostDD1 0 (new Reach) Subcat Reach Aon Lmk yY C: \ algold3 \ algold3ROUTEfinalboth scott 10 year post dev combined Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 2 HydroCADO 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Area Listing (all nodes) Area (sq-ft) C Description (subcats) 272,090 0.40 50-75% Grass cover, Fair, HSG B (PostDDl) 83,840 0.90 Paved parking & roofs (PostDDl) 355,930 y� C: \ algold3 \ scott 10 year post dev combined algoldMOUTEfinalboth Rainfall Duration=60 min,- Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter Bivd.Havelock,NC28532 Page 3 HydroCADO 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Subcatchment PostDD1: PostDD1 Runoff = 29.99 cfs @ 0.17 hrs, Volume= 107,965 cf, Depth= 3.64" Runoff by Rational method, Rise/Fall=1.0/1.0 xTc, Time Span-- 0.00-3.00 hrs, dt= 0.01 hrs Rainfall Duration=60 min, Inten=7.00 in/hr Area (so C Description 83,840 0.90 Paved parking & roofs 272,090 0.40 50-75% Grass cover, Fair, HSG B 355,930 0.52 Weighted Average 355,930 0.52 Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 10.0 Direct Entry, y/O C: \ algold3 \ scott 10 year post dev combined algold3ROUTEfinalboth Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 4 HydroCADO 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Hydrograph for Subcatchment PostDD1: PostDD1 Time Runoff (hours) (cfs) 0.00 0.00 0.05 9.00 0.10 17.99 0.15 26.99 0.20 29.99 0.25 29.99 0.30 29.99 0.35 29.99 0.40 29.99 0.45 29.99 0.50 29.99 0.55 29.99 0.60 29.99 0.65 29.99 0.70 29.99 0.75 29.99 0.80 29.99 0.85 29.99 0.90 29.99 0.95 29.99 1.00 29.99 1.05 20.99 1.10 12.00 1.15 3.00 1.20 0.00 1.25 0.00 1.30 0.00 1.35 0.00 1.40 0.00 1.45 0.00 Time Runoff (hours) (Cfs) 1.50 0.00 1.55 0.00 1.60 0.00 1.65 0.00 1.70 0.00 1.75 0.00 1.80 0.00 1.85 0.00 1.90 0.00 1.95 0.00 2.00 0.00 2.05 0.00 2.10 0.00 2.15 0.00 2.20 0.00 2.25 0.00 2.30 0.00 2.35 0.00 2.40 0.00 2.45 0.00 2.50 0.00 2.55 0.00 2.60 0.00 2.65 0.00 2.70 0.00 2.75 0.00 2.80 0.00 2.85 0.00 2.90 0.00 2.95 0.00 Time Runoff (hours) (cfs) 3.00 0.00 y9 C: \ algold3 \ scott 10 year post dev combined algold3ROUTEfinalboth Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 5 HydroCADO 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Reach 1R: (new Reach) Inflow Area = 355,930 sf, Inflow Depth = 3.64" Inflow = 29.99 cfs @ 0.17 hrs, Volume= 107,965 cf Outflow = 30.00 cfs @ 0.19 hrs, Volume= 107,965 cf, Atten= 0%, Lag=1.2 min Routing by Stor-Ind+Trans method, Time Span= 0.00-3.00 hrs, dt= 0.01 hrs Max. Velocity= 4.46 fps, Min. Travel Time= 0.4 min Avg. Velocity = 3.74 fps, Avg. Travel Time= 0.4 min Peak Storage= 673 cf @ 0.18 hrs, Average Depth at Peak Storage=1.20' Bank -Full Depth=10.00', Capacity at Bank -Full= 5,220.29 cfs 2.00' x 10.00' deep channel, n= 0.022 Earth, clean & straight Side Slope Z-value= 3.0 '/' Top Width= 62.00' Length=100.0' Slope= 0.0070 '/' Inlet Invert-- 2.70', Outlet Invert-- 2.00' qj C: \ algold3 \ scott 10 year post dev combined algold3ROUTEfinalboth Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 6 HydroCADO 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Hydrograph for Reach 1R: (new Reach) Time Inflow Storage Elevation Outflow (hours) (cfs) (cubic -feet) (feet) (cfs) 0.00 0.00 0 2.70 0.00 0.20 29.99 672 3.90 29.99 0.40 29.99 672 3.90 29.99 0.60 29.99 672 3.90 29.99 0.80 29.99 672 3.90 29.99 1.00 29.99 672 3.90 29.99 1.20 0.00 14 2.76 0.21 1.40 0.00 0 2.70 0.00 1.60 0.00 0 2.70 0.00 1.80 0.00 0 2.70 0.00 2.00 0.00 0 2.70 0.00 2.20 0.00 0 2.70 0.00 2.40 0.00 0 2.70 0.00 2.60 0.00 0 2.70 0.00 2.80 0.00 0 2.70 0.00 3.00 0.00 0 2.70 0.00 yy C: \ algold3 \ scott 10 year post dev combined algold3ROUTEfinalboth Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 7 HydroCADO 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Stage -Discharge for Reach 1R: (new Reach) Elevation Velocity Discharge (feet) (ft/sec) (cfs) 2.70 0.00 0.00 2.90 1.66 0.86 3.10 2.43 3.11 3.30 3.03 6.92 3.50 3.55 12.51 3.70 4.02 20.12 3.90 4.46 29.96 4.10 4.87 42.26 4.30 5.26 57.22 4.50 5.63 75.03 4.70 5.99 95.90 4.90 6.34 119.99 5.10 6.68 147.51 5.30 7.01 178.61 5.50 7.33 213.48 5.70 7.64 252.28 5.90 7.95 295.18 6.10 8.25 342.34 6.30 8.55 393.91 6.50 8.84 450.06 6.70 9.12 510.94 6.90 9.40 576.69 7.10 9.68 647.47 7.30 9.95 723.43 7.50 10.22 804.70 7.70 10.49 891.43 7.90 10.75 983.76 8.10 11.01 1,081.83 8.30 11.26 1,185.78 8.50 11.52 1,295.74 Elevation Velocity Discharge (feet) (ft/sec) (cfs) 8.70 11.77 1,411.85 8.90 12.01 1,534.24 9.10 12.26 1,663.03 9.30 12.50 1,798.37 9.50 12.74 1,940.38 9.70 12.98 2,089.18 9.90 13.21 2,244.91 10.10 13.44 2,407.69 10.30 13.68 2,577.64 10.50 13.91 2,754.88 10.70 14.13 2,939.54 10.90 14.36 3,131.74 11.10 14.58 3,331.60 11.30 14.80 3,539.24 11.50 15.02 3,754.77 11.70 15.24 3,978.32 11.90 15.46 4,209.99 12.10 15.68 4,449.91 12.30 15.89 4,698.19 12.50 16.10 4,954.95 12.70 16.31 5,220.29 C: \ algold3 \ scott 10 year post dev combined algold3ROUTEfinalboth Rainfall Duration=60 min, Inten=7.00 in/hr Prepared by KsMj Engineering, 388 McCotter B1vd.Havelock,NC28532 Page 8 HydroCADO 8.00 s/n 004746 © 2006 HydroCAD Software Solutions LLC Stage -Area -Storage for Reach 1R: (new Reach) Elevation End -Area Storage (feet) (sq-ft) (cubic -feet) 2.70 0.0 0 2.90 0.5 52 3.10 1.3 128 3.30 2.3 228 3.50 3.5 352 3.70 5.0 500 3.90 6.7 672 4.10 8.7 868 4.30 10.9 1,088 4.50 13.3 1,332 4.70 16.0 1,600 4.90 18.9 1,892 5.10 22.1 2,208 5.30 25.5 2,548 5.50 29.1 2,912 5.70 33.0 3,300 5.90 37.1 3,712 6.10 41.5 4,148 6.30 46.1 4,608 6.50 50.9 5,092 6.70 56.0 5,600 6.90 61.3 6,132 7.10 66.9 6,688 7.30 72.7 7,268 7.50 78.7 7,872 7.70 85.0 8,500 7.90 91.5 9,152 8.10 98.3 9,828 8.30 105.3 10,528 8.50 112.5 11,252 Elevation End -Area Storage (feet) (sq-ft) (cubic -feet) 8.70 120.0 12,000 8.90 127.7 12,772 9.10 135.7 13,568 9.30 143.9 14,388 9.50 152.3 15,232 9.70 161.0 16,100 9.90 169.9 16,992 10.10 179.1 17,908 10.30 188.5 18,848 10.50 198.1 19,812 10.70 208.0 20,800 10.90 218.1 21,812 11.10 228.5 22,848 11.30 239.1 23,908 11.50 249.9 24,992 11.70 261.0 26,100 11.90 272.3 27,232 12.10 283.9 28,388 12.30 295.7 29,568 12.50 307.7 30,772 12.70 320.0 32,000 t1 November 21, 2008 Subject: Subsurface soil exploration Scotts farm Subdivision INTRODUCTION The following report contains the results of subsurface field test, to establish the in situ height of the seasonal high water table. Neither this report, nor the field tests performed are intended to serve as geotechnical recommendations or as a basis of pavement design selection. On November 10, 2008 KSMJ, pllc performed a subsurface soil exploration at the site of the proposed Scotts Farm Subdivision project The site is to be located at 1545 Country Club Road, approximately one half mile east of 20'h Street in Morehead City, Carteret County. Based on information from the provided plans, a curb outlet and swale system is proposed to meet the DNER low density stormwater requirements. As such hand auger borings were performed at 500 foot intervals 25 feet from the existing swale centerline. From general observations of the existing and historical property use of the property it appears the property has been farm land at some point in time. Based on the observations and soil classifications, the generalized subsurface conditions, the depth to seasonal highwater table appears to be approximately 3.75-4 feet. FIELD EXPLORATION Beginning (eastern) edge of swale: Topsoil to 6 inches Beneath top soil was grayish -brown and fine loamy sand. Groundwater table was not encountered Center (confluence) of swales: Topsoil to 6 inches Beneath top soil was dark brown and sandy loam. Groundwater table was encountered at 45 inches. Beginning (western) edge of swale: Topsoil to 6 inches Beneath top soil was grayish -brown and fine loamy sand. Groundwater table was not encountered Laboratory testing was not performed Susan Sayger, PE KSMJ Engineering, pllc 388 McCotter Blvd., Havelock, NC 28532 =is 252-349-5803 �Sq ..Sp G� 52 - Melanie Arthur 3P CARTERET COUNTY MA Date 06/27/2007 Time 16:11:00 GR 1229337 Page 1 of 3 NORTH CAROLINA. CARTERET COUNTY This Instrument and this certiftcate are duly filed at the date and time and in the Book and Page shown op the first page hereof. I Arthur, CARTERET COUNTY 32407 06/Z7/2007 $1,393.00 N eiE OF NQpLINA � ('.�\`�� Rea! Estate � t. t Excise Tax -: NORTH CAROLINA GENERAL WARRANTY DEED Excise Tax: S/ .CO Parcel Identifier No. 638718413889 and 638718401516 �'193 "I,I e" Mail/Box to: Kirkman Whitford Brady & Berryman. P.A. This instrument was prepared by: Kirkman, Whitford, Brady & Berryman, P.A. Brief description for the Index: Lot 200 Blair Farms Subdivision and Lot 13, Mrs. H.H. Scott Division THIS DEED made this 27th day of June, 2007, by and between GRANTOR GRANTEE DAVID A. HORTON and wife, S.F. BALLOU, INC. KAREN D. HORTON 301 Commerce Avenue Morehead City, NC 28557 The deli;nation Grantor and Grange as used herein shall include said parties, their heirs, successors, and assigns, and shall include singular, plural, masculine, feminine or neuter as required by context. WITNESSETH, that the Grantor, for a valuable consideration paid by the Grantee, the receipt of which is hereby acknowledged, has and by these presents does grant, bargain, sell and convey unto the Grantee in fee simple, all that certain lot or parcel of land situated in, Morehead Township, Carteret County, North Carolina and more particularly described as follows: SEE EXHIBIT A ATTACHED A map showing the above described property is recorded in Map Book, Page TO HAVE AND TO HOLD the aforesaid lot or parcel of land and all privileges and appurtenances thereto belonging to the Grantee in fee simple. 0 BOOK /-2oZ 9 PAGE 337 - 5 3 - And die Grantor covenants with the Grantee, that Grantor is seized of the premises in fee simple, has the right to convey the same in fee simple, that title is marketable and free and clear of all encumbrances, and that Grantor will warrant and defend the title against the lawful claims of all persons whomsoever, other than the following exceptions: Any and all restrictions, covenants and easements of record. IN WITNESS WHEREOF, the Grantor has duly executed the foregoing as of the day and year first above written. 6�%CGG7C�� eZ9U-t (SEAL) (Entity Name) DAVID A. HORTON M "Title: (SEAL) KAREN D. HORTON By: _ (SEAL) Title: BY: (SEAL) Title: Mp�;//,State of North Carolina - County of Carteret 0 F -Ae undersigned Notary Public of Carteret County and the aforesaid State, certify that David E. ton and Karen D. Horton personally appeared before me this day and acknowledged the due n NOTARY exeution of the foregoing instrument for the purposes therein expressed. Witness my hand and 9 PUBLIC trial stamp or seal this 9Z day of June, 2007.,// Commission Expires: /25/201i Connie M. Koebbe,Notary Public MP State of North Carolina - County of I, the undersigned Notary Public of the County and State aforesaid, certify thatpersonally came before me this day and acknowledged that he is a of , a North Carolina corporation/limited liability company/general partnership/limited partnership (strike through the inapplicable), and that by authority duly giver and as the act of such entity, lie signed the foregoing instrument in its name on its behalf as its act and deed. Witness my hand and Notarial stamp or seal, this day of , 2005. My Commission Expires: Notary Public BOOK /-2a r1 PAGE 33 -54(- EXHIBIT A Tract l: Being all of Lot 200, of Blair Farms Subdivision, Section Two, according to the plat thereof recorded in Map Book 29, Pages 842-A and 842-B, Carteret County Registry, reference to which is hereby made for greater certainty of description. This conveyance is made and accepted subject to the Blair Farm Declaration of Master Protective Covenants, Restrictions, and Easements recorded in Book 859, Page 452, and the Declaration of Submission of Blair Farm -Section Two to Master Declaration recorded in Book 895, Page 783, Carteret County Registry. Tract 2: Being all of Lot 13, as shown on the map entitled "Mrs. H.H. Scott", prepared by John W. Collier, Registered Surveyor, dated October 10, 1972 and recorded in Map Book 9, Page 18, Carteret County Registry. — 55 — t t SOSID:0009681 ' Date Filed: 5/12/2008 9:01:00 AM Elaine F. Marshall 0.479(39t1 Business Corporation North Carolina Annul North Carolina Secretary of State 8.21-07 2008 157 00924 This report maybe bled online at the Secretary of State wabskww e: wssn oc.eom Name of Business Corporation: SF BALLOU, INC Fiscal Year En ding: 12-31-07 State of Incorporation: NORTH CAROLINA M.M / by / Veer Secretary of State 10 Number. 0009681 E] I hereby certify that the Information requested below (required by NCGS 55-16-22) has not changed since the most recently filed annual report and is therefore complete. Nature of Business: CONSTRUCTION Registered Agent: Registered Office Mailing Address: County: City: State: ZIP Code, Registered Office Street Address: County: City: State: ZIP Code Signature of New Registered Agent: relen.wm canacwtee consent w we eppdntrnene Principal Office Telephone Number: 252-726-0780 Principal Office Mailing Address: 301 COMMERCE AVE. SUITE 101 City: Stale: ZIP Code: MOREHEAD CITY, NC 28557 Principal Office Street Address: 301 COMMERCE AVE. SUITE 101 City: State: ZIP Code. MOREHEAD CITY, NC 28557 Name Title and Business Address of Principal Officers: Name: Title: S.F. BALLOU, JR. PRESIDENT Address: P.O. BOX 1201 MOREHEAD CITY, NC 28557 CI : Slate* ZIP: Name: Title: Address: City: State: ZIP: Name: Title: Address: City: State: ZIP: Certification of by all Business Corporations). �-I$los PRESIDENT Tee t SOSID:0009681 Date Filed: 5/12/2008 9:01:00 AM Elaine F. Marshall CB479 (39t1 Business Corporation North Carolina Annu North Carolina Secretary of State B-21-07 2008 157 00924 This report may he filed online at the Secretary of State websde: www.sasnc.eom Name of Business Corporation: SF BALLOU, INC Fiscal Year Ending: 12-31-07 State of incorporation: NORTH CAROLINA swmh / Dry 7 veer Secretary of State 10 Number: 0009681 [] I hereby certify that the Information requested below (required by NCGS 55.16-22) has not changed since the most recently filed annual report and is therefore complete. Nature of Business: CONSTRUCTION Registered Agent: Registered Office Mailing Address: County: City: State. ZIP Code: Registered Office Street Address: County: City: State: ZIP Code: Signature of New Registered Agent (SlgneNre wnetlWtea consent m Na eppoMtrnenp Principal Office Telephone Number: 252-726-0780 Principal Office Mailing Address: 301 COMMERCE AVE. SUITE 101 City: State: ZIP Code: MOREHEAD CITY, NC 28557 Principal Office Street Address: 301 COMMERCE AVE. SUITE 101 City: Stale: ZIP Code. MOREHEAD CITY, NC 28557 Name Title and Business Address of Principal Officers: Name: Title: S.F. BALLOU, JR. PRESIDENT Address: P.O. BOX 1201 MOREHEAD CITY, NC 28557 City: State* ZIP: Name: Title: Address: City' State: ZIP: Name: Title: Address: City' State: ZIP: Certification of annu rep ( usl he comp led by all Business Corporations). Sigmture fform mus fined by en oleom or ompomWnl De. S.F. BALLOU JR. PRESIDENT 76ee11/10-1U-07 Typsor Print Name To. 0�0� WATF9oG Michael P Easley, Governor William G. Ross Jr, Secretary r North Carolina Department of Environment and Natural Resources 'C Coleen H Sullins Director Division or Water Quality October 28, 2008 Mr. Sammie Ballou S.F. Ballou, Inc. 301 Commerce Aveune Morehead City, NC 28557 Subject: Application Return Scotts Farm Subdivision Stormwater Project No. SW8 not assigned Carteret County Dear Mr. Ballow: The Division received an incomplete stormwater application for the subject project on September 30, 2008, and returned the application as incomplete on October 2, 2008. Your consultant, William Gold, P.E., with Meridian Engineering, sent in a letter dated October 8, 2008, which contained comments to address the deficiencies, but respectfully disagreed with the incomplete determination. He believes that it should not have been returned and requested a meeting with us to discuss. Unfortunately, the decision has already been made and is documented, and can't be changed. What the Division uses to determine the completeness of an application is set forth in the rules. Over the years, as rule changes and interpretations have occurred, the Division simplified the process by compiling the requirements for each specific application type into a checklist, which is available on our website. A substantially complete application is a simple matter of understanding the checklist, and providing those listed items with the application. The Division understands that the incompleteness of this application raises a problem for you in that it was not submitted complete before the October 1, 2008, rules change deadline. You are now faced with the following two choices: 1) to either redesign the project to meet the 12% low density limits set forth in SL 2008-211; or 2) to provide a vested development right as described in Section 1005 2.(d) of the rule. If you cannot redesign the project, I encourage you to pursue the vested development right. This can be as simple as a preliminary plan approved by the local governing authority, that meets the preliminary plan requirements established by ordinance of that governing authority. N�hcarohna aturally North Carolina Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Phone (910) 796-7215 Customer Service Wilmington Regional Office Internet www.ncwaterQuality.org Fax (910) 350-2004 1-877-623-6748 An Equal Opportunity/Affirmative Action Employer— 50% Recycled110 % Post Consumer Paper Mr. Ballou October 28, 2008 Scotts Farm Subdivision Mr. Gold responded to each of the deficiencies, but some of his responses need to be clarified. Comment #2 - For low density projects with curbed and guttered streets, a curb outlet swale system is required to treat the road runoff. Each swale that receives runoff directly from the road must be designed with a minimum length of 100', a maximum longitudinal slope of 5%, side slopes of 5:1 or flatter, and must pass the 10 year storm at a non -erosive velocity. (See Section .1008 (g) of the stormwater rules). Once past the 100" the remainder of swale or perimeter ditches are not part of the curb outlet swale system, do not need calculations, and should not be listed on the curb outlet supplement form. Comment #3 - The velocity in the swale is determined in part by the area draining to that swale only, and by the impervious area within the drainage area of that swale only. Even though the entire project may ultimately drain to a single point, each individual swale has it's own separate drainage area that it receives its runoff from. Those individual swale drainage areas need to be documented on a separate plan sheet. Keep in mind that the drainage area will, in most cases, include the lots and the BUA on the lots if the lots, or any portions thereof, are graded to drain toward the street. You can't go wrong by assuming the worst case where each lot is graded to drain to the street and all of the BUA on that lot drains to a swale. Comment #6 - The plans contain two ditch section details on Drawing Number SE — 4. One is labeled as a "2:1 Grass Lined Swale" and the other is labeled as a "3:1 Grass Lined Swale." The 2:1 swale is not allowed and should be removed from the plans, as all swales must have a minimum side slope of 3:1. Due to the proposed curbing, this project requires curb outlet swales with 5:1 side slopes. Neither of the swale details shows the 5:1 side slope requirement. As mentioned in the return letter, even though the swale calculations were done with a 5:1 side slope, the swale details on the plans don't support it. The swale details need to show the 5:1 side slope as well, otherwise, how is the contractor to know which swales have a 3:1 slope and which ones have a 5:1 slope? Comment #10 - I've reviewed all of the plan sheets that were submitted and the legend for Sheet SE-1 is the only one that contains a symbol (an oval with numbers in it) that stands for BOTH existing and proposed ditch elevations. It is not standard practice to utilize the exact same symbol to represent both an existing and a proposed condition. Standard practice is to use a thinner or dashed lighter line type for the existing stuff and a thicker, darker or solid line type for the proposed stuff. Additionally, am I correct in assuming that the numbers in the oval are using an "x" in place of the decimal, so where it is written as "2 x 65", it means an elevation of 2.65? If so, Sheet SE-1 does contain a few elevations for the perimeter ditch across the back of the lots. In addition to that, the Division is looking for the proposed curb outlet swale inverts at both the point where it joins the road and 100' away in the swale. Since you've eliminated the piped collection, I assume that the drainage has either been redirected to the one swale that was proposed, or to the new swale to be added at the entrance, or to another new swale. Please make sure that both inverts for all of the proposed curb outlet swales are clearly noted. Page 2 of 3 Mr. Ballou October 28, 2008 Scotts Farm Subdivision Your request to submit under the old rules cannot be granted at this time as the application was not complete as of October 1, 2008, and you have not presented a valid vested development right. Please resubmit the application upon either a redesign of the project's density to 12% or resubmit under the 1995 rules with a valid vested development right. If you have any questions, please do not hesitate to contact me at (910) 796-7215 or email me at linda.lewis@ncmail.net. Sincerely, Linda Lewis Environmental Engineer III ENB/arl: S:\WQS\STORMWATER\LETTERS\2008\scottsfarm.oct08 cc: William Gold, P.E., Meridian Engineering Town of Morehead City Building Inspections Georgette Scott, Stormwater Supervisor Linda Lewis Page 3 of 3 Scotts Farm SD Subject: Scotts Farm SD From: Linda Lewis <linda.lewis@ncmail.net> Date. "Chu, 16 Oct 2008 09:12:56 -0400 To: Ed Beck <Ed.Beck@ncmail.net>, Georgette Scott <Georgette.Scott@ncmail.net>, Bradley Bennett <bradley.bennett@ncmail.net>, Scott Vinson <Scott.Vinson@ncmail.net> On September 30, I received a low density application for this subdivision in Carteret County. Projects in Carteret County are now subject to the October 1 rules. Approximately 12 deficiencies were noted and the application was returned on October 2, 2008, with a list of those deficiencies and a note that since the application was not accepted as complete prior to October 1, 2008, it would either have to be redesigned to the October 1, 2008, rules, or a vested development right needed to be provided. The engineer submitted a letter on October 15, 2008, respectfully disagreeing with our determination that the application was "incomplete" and wants to meet to discuss it. Before I schedule the meeting, please take a look at the attached list of deficiencies for this application and let me know if I was justified in returning it as incomplete and/or justified in requiring a redesign to the 01-OCT-2008 rules or a vested right. Thanks, Linda scottsfarm.oct08.docContent-Type: application/msword � Content -Encoding: base64 1 of 1 10/16/2008 9:14 AM Meridian Eneineerim, PA/KSWI Engineerina, 8 October 2008 Ms. Linda Lewis North Carolina Division of Water Quality Wilmington Regional Office 1327 Cardinal Drive Extension Wilmington, NC 28405 Re: Scotts Farm Subdivision Review Carteret County Dear Ms. Lewis, RECEIVED BY: OCT 15 2008 We received and have carefully reviewed your comments regarding Scotts Farm Subdivision, Morehead City, Carteret County, North Carolina and respectfully disagree with your decision that the package was substantially incomplete as many of the comments are of a typical review nature and do not warrant rejection of the plan. We have addressed each of your comments as follows: COMMENT 1: Please report your title in S. F. Ballou, Inc. in Section 1.2 of the application. Please include official documentation. You must be at least the level of vice president in order to sign the permit application. RESPONSE 1: Minor oversight, application revised as President. COMMENT 2: The streets are curbed and guttered, therefore a completed and signed curb outlet swale supplement and O&M form is required. Please list only the 100' swales that will directly receive street runoff. RESPONSE 2: The entire site drains to the swales along the rear of the lots, more in keeping with lot line swales than curb outlet swales. However, we will provide both. COMMENT 3: Please provide a drainage area map showing the single drainage area for each proposed curb outlet Swale. The drainage area should include the street and any lots that will be graded to drain into the street. RESPONSE 3: The entire project drains to a single outlet point, as such the application was submitted with the single drainage divide. Calculations and cross section were provided at intermittent points along the Swale to ensure major design elements were met. COMMENT 4: Please add a typical street section detail to the plans including sheet and right-of- way width, curbing, and any sidewalks. You will also creed to detail the pavement radius for the temporary turnaround area. RESPONSE 4: So noted and will provide. COMMENT 5: Swale velocity calculations. The 1 year 24 hour storm flowrate calculations are not applicable as this is a low density project Meridian Engineering. PA/KS9U Engineering. �PQc RESPONSE 5: The I & 10 year flow rates were provided as standard design purposes. The 10 year was provided per Major Design Element. COMMENT 6: Please add a new curb outlet swale section detail or modify the existing Swale details to show the required 5.1 side slope for a curb outlet swale. All your calculations are based on a 5.1 side slope, but none of the details support it. RESPONSE 6: This comment is not clear. The grading and calculations, including a graphic printout, support the 5:1 side slopes. See channel calculations provided. COMMENT 7: A curb outlet swale will need to be added to catch the fast 260' of street. RESPONSE 7: So noted, we will add a curb cut at this point. COMMENT 8: Complete the top half of the low density supplement per the enclosed example. RESPONSE 8: So noted, form revised COMMENT 9: Remove the piped collection system in front of Lots 6 & 7. low density does not allow the type of collection shown on the plans. Consider adding another curb outlet swale or relocating the low points to line up with a lot line such that additional piping is not needed. RESPONSE 9: All discrete collection systems have been removed and replaced with curb cuts. COMMENT 10: Please add the proposed grading, pipe inverts, all swale centerline inverts, pavement spot elevations, and catch basin top elevations to the plans. RESPONSE 10: Swale inverts were clearly labeled. See Sheet SW -I. Proposed grading and spot shots will be clarified. COMMENT 11: Please add the nearest intersection of two major roads to the vicinity map. A major road is considered to be any 1, 2 or 3 digit NC, US or interstate highway_ Local streets and four digit NCSR numbers are not major roads. RESPONSE 11: So noted, revised. CON94ENI' 12: A soils report with Seasonal High Water Table elevation at all curb outlet swales. RESPONSE 12: So noted. The report was not yet available Therefore as we stated previously, we respectfully disagree with your decision that the package was substantially incomplete. Of the items listed none are DENR major design elements and many of the above comments are of a typical review nature and do not warrant rejection of the plan. As the reviewer will note, the lots are on average 15% impervious, 3% above the new regulations. To reduce the percent of imperviousness further would be difficult, resulting in a loss of two lots. Current economic conditions have severely impact developement, the loss of any lots would be a considerable burden, if not a project killer, for the owner. Meridian EpidneeriR& PAI KSWJ E59MeeriI!g, Mc More importantly, we feel that there is no benefit or gain to either the State or the project by rejecting it on a technicality(ies). Particularly, as the package included attention to all DENR major design elements, including side slope, length, freeboard and velocity. Again we feel that the review comments are of a typical review nature and are readily remedied with a following submission. As such, we request that we resubmit the package under the old regulations providing the minor additional information and clarification you requested as has been done in the past on previous applies. At a minimum, we request to meet with you to further discuss your decision. Thank you in advance for you time and consideration. re William Gold, PE, Menjdian Engineering, PA Sugdn L. Say/j+ , P4"MJ Engineering, CC: Mr. Sammie Ballou-301 Commerce Avenue, Morehead City Michael F. Easley, Governor William G Ross Jr, Secretary Noah Carolina Department of Environment and Natural Resources Coleco H. Sullins Director Division of Water Quality October 2, 2008 Sammie Ballou S.F. Ballou, Inc. 301 Commerce Avenue Morehead City, NC 28557 Subject: APPLICATION RETURN Project Name: Scotts Farm Subdivision Location/County: Carteret County Dear Mr./Ms. Ballou: The Division received an incomplete stormwater application for the project listed above on September 30, 2008. The application and check number 40602, are being returned because the package lacked the necessary elements to accept it for review. The following information is needed to accept the application for review: ® Please report your title in S.F. Ballou, Inc. in Section 1.2 of the application. Please include official documentation. You must be at least the level of vice president in order to sign the permit application. ® The streets are curbed and guttered, therefore a completed and signed curb outlet swale supplement and O&M form is required. Please list only the 100' swales that will directly receive street runoff. ® Please provide a drainage area map showing the single drainage area for each proposed curb outlet swale. The drainage area should include the street and any lots that will be graded to drain into the street. ® Please add a typical street section detail to the plans including street and right-of-way width, curbing, and any sidewalks. You will also need to detail the pavement radius for the temporary turnaround area. ® Swale velocity calculations. The 1 year 24 hour storm flowrate calculations are not applicable as this is a low density project. ® Please add a new curb outlet swale section detail or modify the existing swale details to show the required 5:1 side slope for a curb outlet swale. All your calculations are based on a 5:1 side slope, but none of the details support it. A curb outlet swale will need to be added to catch the first 260' of street. Complete the top half of the low density supplement per the enclosed. example. Remove the piped collection system in front of Lots 6 & 7. Low density does not allow the type of collection shown on the plans. Consider adding another curb outlet swale or relocating the low points to line up with a lot line such that additional piping is not needed. ® Please add the proposed grading, pipe inverts, all swale centerline inverts, pavement spot elevations, and catch basin top elevations to the plans. ® Please add the nearest intersection of two major roads to the vicinity map. A major road is considered to be any 1, 2 or 3 digit NC, US or interstate highway. Local streets and four digit NCSR numbers are not major roads. ® A soils report with Seasonal High Water Table elevation at all curb outlet swales. Ny CCarolina dura//y North Carolina Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Phone (910) 796-7215 Customer Service Wilmington Regional Office Internet wwwncwmeraualitvore Fax (910)350-2004 1-877-623-6748 An Equal Opportunity/Affirmative Action Employer— 50% Recycledl10% Post Consumer Paper Ballou October 2, 2008 Please note that projects received after October 1, 2008, must adhere to the new coastal stormwater rules. Since this project was substantially incomplete and is being returned, you will need to either redesign the project to adhere to these new rules, or include a copy of a vested right (as listed in the Session Law) issued prior to October 1, 2008 along with your corrected and resubmitted application. Please visit DWQ's website at httg://h2o.enr.state.nc.us/su/bmp forms.htm to download the latest available forms. Please provide the requested information and return the package to the address below. If you have any questions, please do not hesitate to call me at (910) 796-7301 or email me at linda.lewis(a)ncmail.net. Sincerely, o Gi�G�Gv Gx�� Linda Lewis Environmental Engineer III ENB/arl: S:\WQS\STORMWATER\RETURN\scottsfarm.oct08 cc: William Gold, P.E., Meridian Engineering Linda Lewis V) ? AID Page 2 of 2 STORMWATER CALCULATIONS & SEDIMENTATION & EROSION CONTROL DATA For FNG G09PO/RgrF Y SEAL i SCOTTS FARM SUBDIVISION S. F. Ballou, Inc. 301 Commerce Avenue Morehead City, N. C. 28557 September 26, 2008 Prepared by HMSJ, PLLC W. 2850.-T �li'sva/one �o2//v �acolincv 28501 Xl'olz ll -1-252-522-2587 SCOTTS FARM SUBDIVISION TABLE OF CONTENTS • Cover • Table of Contents 2 • Major Design Elements 4 • Stormwater Management Permit Application 6 • Low Density Deed Restrictions 10 • Low Density Supplement 11 • Financial Responsibility/Ownership Form 15 • Construction Sequence 17 • Calculations/ Data 18 • Deed Copy 40 2 S. F. Ballou, Inc. 9-25-08 Scotts Farm Subdivision Low Density -Grassed swale Morehead, Carteret County North Carolina This narrative discusses the low density stormwater permit application for the Scott s Farm Subdivision project. The plan includes construction of a 18 single family residential subdivision on a 8.18-arce parcel located off Ashley Drive, near Country Road, Carteret County, North Carolina. The attached plan and calculations are for details of a trapezoidal shaped, open channel conveyance swale which outfall into the existing Swale along the southern boundary. EXISTING/PROPOSED CONDITIONS The existing topography of the parcel is divided into two drainage divides. They are relatively flat and drain at a minimum grade of 1 % to the center of the site and into an existing ditch. The site maintains the existing drainage divides. The site proposes less than 24% impervious surfaces, as such stormwater is being managed and permitted under the grassed swale, low density option. The site is designed with two drainage divides that drain to the trapezoidal grassed swales. The swales have a two -foot bottom width, with 5:1 side slopes, and one -foot freeboard above the one year event. The swales drain at 0.4% MAJOR DESIGN ELEMENTS Swale Parameters The channel was design in accordance with NC DENR specifications to provide the nitrogen reduction. The proposed channel which is approximately 1,600 total feet (greater than 150 feet), drains at a 0.4% slope. With an two -foot bottom and 5:1 side slopes, the capacity of the grassed channel provides 0.5- feet of freeboard. The channel is designed such that the one year stone is 1.8 fps. At the downstream end where the proposed swales discharges into the existing channel, the 10 year velocity is also non - erosive at 2.1 fps(See attached calculations). The BMP is to be located within a drainage easement to be recorded, along with maintenance agreement upon approval. The system reduces the 1 year, post development to 1.8 cfs, less than the pre -development run-off from the site of 4.0 cfs. GKO5a(I&pfa 388 McCover Blvd., Havelock, NC 28532 P LANN�N�y_D ESIG, tJ�,_ENGINEE,fj 11J,G, -- 3 Scott's Faun Subdivision Low Density -Grassed Swale Morehead, Carteret County North Carolina • The 1-year, 24 hour pre -development run-off= 4.03 cfs • The 1-year, 24 hour post -development run-off= 1.8cfs • The 10-year post -development velocity = 2.12 fps • Provided channel length = over 1,600 ft, greater than 150 feet • Provided channel slope = 0.4%, less than 5% • Provided channel side slopes = 5:1 • Provided freeboard = 0.5 feet Recorded easement and maintenance agreement CONCLUSION Supporting Documentation (Pre-Dev Route) (Route) (Route) (Plan set) (Plan set) (Plan set) (Plan set/channel calc) (Plan set) The proposed design is for 8.18 total acre site for a 18 lot single family residential subdivision. All impervious surfaces will drain to the BMP conveyance grassed swales. The proposed BMP contains the required event, design parameters, freeboard, meeting or exceeding all DENR size, depth and volume requirements. o6uran r o3'Ner, k'C Susan H. Sayger,PE KSMJ,pllc/Meridian Engineering PA 388 McCotter Blvd, Havelock, NC 28532 252-349-5803,252-444-5765 CK()50WCYpdo 388 McCotter Blvd., Havelock, NC 28532 P.b.AfS/H€.lraC!�._ E N tl1:1.E.�.RSN.g. 4 - Name of Stream Description Curr. Class Date Basin Stream Index # Wading Creek From source to Newport SA;HQW 06/01/56 white Oak 21-27 i�� • River ' Cable Creek From source to Newport SA;HQW 06/01/56 White Oak 21-28 River Willis Creek From source to Newport SA;HQW 06/01/56 White Oak 21-29 River Southwest Prong From source to Newport C 06/01/56 White Oak 21-3 Newport River River Mairey Branch From source to C 06/01/56 White Oak 21-3-1 Southwest Prong Newport River Millis Swamp From source to C 06/01/56 White Oak 21-3-2 Southwest Prong Newport River Juniper Branch From source to C 06/01/56 White Oak 21-3-3 Southwest Prong Newport River Peak Swamp From source to C 06/01/56 White Oak 21-3-9 Southwest Prong Newport River Jasons Branch From source to C 06/01/56 White Oak 21-3-5 Southwest Prong Newport River East Prong From source to Jasons C 06/01/56 White Oak 21-3-5-1 Jasons Branch Branch Milldam Branch From source to C 06/01/56 White Oak 21-3-6 Southwest Prong Newport River Crab Point Bay Entire Bay SA;HQW 06/01/56 White Oak 21-30 Page 5 of 16 - 5 - � i,tDF1-RA-DA = 9L:g No. Lot; Lr. �(60;0OOX�2a5)�5000t10'000. t Total lot:yB;UA.:frori g•listin 9 SOD III. REQi.MkEDrIE3,n CHECKU3T is r_a :?aca Fco•:idod tc :adisato tat -1. fcZaai=: nquu=;=; bra haaL =—. x_c :apponnF rmt_ameioo is xc::dad as aaca::arr. :f dco >ppl:.cz :zas d:: ;=tod an I=: >n :_a 3ca m1a: \:zaF:r_aot ?:co••• ?: �i:ICc= F=. tha aac: mz+ =iul talow. .ippc:ants :m=sl: a. Ai0 L"sc;=:>surf-.:a utzr:. R>jxt::a tho\oz:o i:ra hL::a mzc:ogaira LddidcLLl hu:-Car:. S. 7aad r.:= cticc 13umac: as nquirad a= farm SWU-:C 1 ;2Uca racxdod a: a r::_sca cx•:ra.s. A :cp. cf &a Mooch! doc::=•am :Fall to prc::dad tc Z:l-r sr:La 19 da:: of FL3tm: nd Frior to sLis of a 1>fs. C. 5Jt uFca Loot cai:uLj=; ara Fro:•sdad Ecr d•.o x•:riJ prn:a z-;: a_ lots. d ?r>juct cozf ::>low dsu=:yraquirx::us a_:aia tta CUM, .i=C [15A Y;AC _fi.: 7,21C$] For Low Density projects where the lot BUA's will vary, complete the top portion of the calculation but don't divide by the number of lots, This will give the maximum BUA to be distributed among the lots. Attach the lot listing with the BUA totaled to demonstrate that the proposed lot BUA is less than the maximum allowed. 01 SCOTTS FARM SUBDIVISION CONSTRUCTION SEQUENCE i. - Install temporary silt fence on the north, south and west sides of the property along the property lines except across the eastern driveway into the property. 2. Shape and install inlet protection at the middle of the property to act as a sediment trap during construction. When construction is complete the trap will be removed and the new swale will be constructed. 3. Seed disturbed areas and stabilize slopes with fabric if needed within 21 days. 4. When the construction is complete the trap will be replaced with a swale. 5. Haul in approved fill material, spread and compact over building sites with slight slope away from the building in all four directions. 6. Cut new road - Ashley Drive — and shape for proper drainage. 7. Pave road, install sidewalks and seed pervious areas. 8. Clean out sediment in sediment basin and restore swale. 9. Do not remove temporary silt fence until construction is complete. S. F. Ballou, Inc. 9-5-08 1 1.7 -